HOI4 USA Guide 2026: All Five Focus Tree Paths Compared

Hearts of Iron IV gives the United States the largest industrial base in the game and the most reasons not to use it. Learning how to play the USA in HOI4 is mostly learning how to unlock yourself: a national spirit that halves your recruitable population, a Congress that has to vote for your focuses, and a world-tension bar that decides when you are allowed to join anything at all.

This HOI4 USA guide for 2026 covers that opening in full — the focus tree and the order to open it in, getting out of the Great Depression, lend-lease, garrisons, division template width, and the Pacific war against Japan — and then five complete playthroughs, one down each branch of the tree. The mechanics sections are checked against the Hearts of Iron IV wiki; the playthrough sections are what one specific campaign did, timestamps and all.

DLC confirmed on-screen (Man the Guns and No Compromise, No Surrender banners, 0:40–0:50) and in narration ("every single DLC up to No Compromise, No Surrender active"). No patch/version number is stated; treat the upload date 2026-04-28 as the reference point.

🎯 The core idea

"Every Way To Play The United States" isn't one build, it's five. All five share the same New Deal opening, then fork into a different national-spirit path: staying isolationist for industry bonuses (Neutrality), trading industry for an earlier war (Interventionism), a communist revolution surviving a second civil war (Democratic Socialism), a MacArthur-led coup conquering by threats and armies (Fascist Empire), and a second civil war handing the country to a Confederate-revivalist fascist (Confederacy). The shared opening is covered once, then each path separately. Nothing here is optimized play; some scenarios are lost on purpose for entertainment, so treat checklists as "what happened," not "guaranteed to work."

• free costs nothing
• cheap small cost
• setup needs preparation
• grind pays off slowly
• skip the thing to avoid

The USA focus tree: what the branches actually gate

The HOI4 USA focus tree is not really five paths so much as four locks, and all five runs below spend their opening picking at the same ones. Three of the locks are national spirits the United States is already carrying in 1936.

Two of those quietly explain decisions the paths below make without comment. Home of the Free is why an ideology switch is a strategic move rather than flavour: while it is up, the USA cannot join a faction led by another ideology, so the socialist and fascist runs are buying faction access as much as they are buying focuses. And the Great Depression's halved recruitable population is why every path opens with economic focuses instead of military ones — a 1936 USA that starts drafting is drafting out of half a country.

The fourth lock is Congress. USA focuses carry a line reading "Requires the support of at least X Senators and Y Representatives", and across the tree those thresholds run from 39 to 58 of the 100 Senate seats and from 174 to 261 of the 435 seats in the House. Passing legislation while below the requirement costs stability and war support — which is what the paired newspaper event cards further down this page are actually reporting when they charge you Senator Support.

On top of the locks sit two mutual exclusivities that shape everything after them: Continue the New Deal against Reestablish the Gold Standard at the top of the economy, and Neutrality Act against Limited Intervention at the top of foreign policy.

Where every path begins

The stock American tree runs to 281 focuses, flashed on screen before anything else. Every path starts down the same opening stretch: Continue the New Deal into Suspend the Persecution and WPA, opening sub-branches (Union Representation Act, Agricultural Adjustment Act) relevant regardless of path.

Getting out of the Great Depression

Getting the USA out of the Great Depression in HOI4 is not an event you wait for. It is a national spirit, and the economic branch does not delete it — it swaps it for progressively milder versions of itself.

The two replacement spirits are where the country comes back, and it is worth reading them as a penalty shrinking rather than a bonus arriving. Each swap is shown in the focus tooltip as a gain — Slow Recovery as Recruitable Population Factor: +10%, Resource Gain Efficiency: +5.00% and a -0.35 daily political power cost, and Slow Economic Growth as +20% on the first of those — but what the country is actually carrying afterwards is a smaller version of the same debuff: -50% recruitable population under The Great Depression, -40% under Slow Recovery, -20% under Slow Economic Growth. You never get the manpower back in full. Getting from half a country to four fifths of one is still worth more to a 1936 USA than any single industry focus in the tree — it is the difference between a country that can field the armies below and one that cannot.

There is a second route out, and it is easy to miss because most games never offer it. Reestablish the Gold Standard is mutually exclusive with Continue the New Deal and requires that Roosevelt is not your leader. It grants On the Gold Standard: +5% Consumer Goods Factories and +10% Stability. Consumer goods going up is the price you pay; the stability is what you are buying, and it only earns its keep on a run that is about to do something the country will hate.

HOI4 USA focus order: what to click, and when

There is no single correct HOI4 USA focus order, because the opening is a race between three clocks and you can only wind one at a time. Which one you pick first is the actual decision; the paths below are the consequences.

1. The economy clock freeContinue the New Deal into WPA, then Agricultural Adjustment Act and Fair Labor Standards Act. This is the clock that hands back recruitable population and resource efficiency, and every path in this guide winds it first.
2. The research clock cheapScientific Research & Development Office is an extra research slot on a country that starts with four, and it sits directly under WPA. A research slot compounds for the rest of the game, so it is the one thing that gets worse the longer you delay it.
3. The tension clock setupNeutrality Act or Limited Intervention. This is the opening choice that decides how early you are allowed to act at all, and the one the five paths below actually fork on.

The USA isolationism focus people usually mean is Neutrality Act, and it is worth reading before clicking. It grants +200 political power and -5% war support, and it raises every bar you have to clear before you can involve yourself in anyone else's war: Join faction tension limit: +25.0%, Send Volunteers tension limit: +50.0%, Guarantee tension limit: +50.0%. With Arms Against Tyranny active it also stops the USA buying or selling arms to countries already fighting.

Limited Intervention is its mirror image. It lowers those same tension limits instead of raising them, and charges for the privilege by doubling the political power cost of economy and conscription law changes — which is precisely the bill a country still climbing out of the Depression can least afford, and precisely why the interventionist run further down feels poorer than the neutral one at the same date.

Neither spirit is permanent, and this is the part that changes how the order is planned: Lend Lease Act replaces whichever of the two you are carrying. Isolationism is not something you have to argue your way out of later — it is something one focus takes off you. Behind Limited Intervention, War Propaganda adds +10.00% base war support. And both Focus on Europe and Focus on Asia unlock the Intervention Mandate decisions, the mechanic that formally asks Congress to authorise military action against a named country; their political power costs are legible in the decisions screenshot in the interventionist section below.

Neutrality: bank industry, join late, steamroll

The pitch: an ocean away from the fighting, staying isolationist lets the New Deal and Neutrality Act industry bonuses stack for years before you ever declare on anyone. The trade-off is time — the creator estimates five full years of build-up if you ride it out completely.

The shared Neutrality/Interventionism side of the tree: Neutrality Act and Limited Intervention sit side by side under Continue the New Deal, with War Propaganda, Lend Lease Act and Arsenal of Democracy down the middle, and the three war plans (Green, Crimson, Gray) plus Reaffirm Monroe Doctrine and Hemisphere Defense on the right. Path 1 takes Neutrality Act; Path 2, Limited Intervention.

1. Lock in the Neutrality Act freeTrades away intervention options for a large industrial bonus while you stay out of foreign wars. 2:34
2. Work with Congress instead of against it setupRepresentative and Senator support swings wildly on random events; treat it as background noise to manage, not fight. 2:54
3. Lobby strategically, not constantly grindPolitical capital is tight during the recovery, so spend it on the lobbying pushes that actually move the tree forward. 3:36
4. Only scrap Neutrality Act once something forces your hand setupIn this run that trigger is Japan attacking a US ship, roughly five years into isolation. 8:50

The Congress mechanic: paired newspaper-style event cards, one describing what happened, one totting up the political cost. A single retiring senator here costs 8 Senator Support — a number that's only visible in the event card, never narrated.

Interventionism: trade factories for an earlier war

Same opening, different fork: instead of banking five years of neutral industry, Path 2 takes Limited Intervention and fights far sooner, at the cost of the Neutrality Act's bonus. The German side of this same war is covered in the companion Germany guide.

1. Elect Alf Landon in the 1936 election setupLandon's 5-step plan skips the New Deal's ~7-month gap between laws, about 6 months faster — but the 11-month election wait costs progress, so the net benefit is debated (see comments). 9:11
2. Pick Focus on Europe over Focus on Asia freeJapan's attack already grants a free war goal against them, so the Asia-first focus adds nothing Europe doesn't eventually need. 10:16
3. Hold the Japan declaration until the navy is ready setupThe Pacific war against Japan starts with radar locating their fleet, then destroying it, before any invasion. 10:37
4. Clear enemy navies before any invasion grindNorth Sea first against Germany, then the Mediterranean against Italy — total naval supremacy before troops move. 11:19
5. Naval-invade behind the front line, not into it grindSardinia and Genoa landings encircle the Italian front in the Alps rather than a head-on push; the same trick reopens the German front via Poland once Berlin stalls. 11:41

The only equipment/production numbers in the whole video, in one composited shot: 30 divisions queued at New York on the left; the naval queue in the middle (dates and costs in the ship table below); air wing readiness on the right. Military Factories read 34/46, Dockyards 56/56 — none of it narrated.

"Operation Striking Force" on the map: invasion arrows behind Dover and Calais, division counts (10, 12, 20, 24) on each — the naval-invasion-behind-the-lines tactic from the checklist above, in practice; not mentioned in narration.

Path 2 runs the same Arsenal of Democracy → Wartime Industry chain as Path 1, continuing one focus further to the Manhattan Project. Same "+20 Factories" callout as Path 1's tree.

The decisions panel behind foreign management: "Foreign Influence" decisions (aluminium, tungsten, steel, iron ore) cost 25 political power each; "Intervention Mandate" costs more — 75 to prepare an intervention against the German Reich, 50 for Congress's approval. None of these costs are read aloud.

Democratic Socialism: abandon the free market, survive the civil war

This path swaps the New Deal for full socialist focuses to escape the Depression faster, at the cost of a near-guaranteed second civil war.

The socialist fork of the tree: Union Representation Act leads to Democratic Socialism, opening Full Desegregation, Liberty for the Philippines and eventually Pacific Decolonisation. In parallel, Guarantee the American Dream leads into Worker Management Act and Communal Property Act, with US-USSR Economic Cooperation and Shatter the Empires further along.

1. Add socialist economic focuses to the recovery track grindGets out of the Depression faster than the New Deal, at the cost of provoking anti-communist unrest. 15:12
2. Pre-train cheap divisions and station them in the likely-secessionist south setupThe creator calls this "a slight hunch," but it's really a certainty. 15:34
3. After the civil war, join the Soviet faction and take Japan directly grindNavy and troops staged out of Vladivostok, then a direct invasion of Japan's home islands. 17:02
4. Don't commit troops to save the USSR from Germany skipThe American president and Soviet premier don't get along, so the USSR fights Germany alone — the payoff comes later when a collapsing USSR offers to submit to Washington. 18:46

Fascist Empire: MacArthur's coup, threats over invasions, and a fatal overreach

The most eventful path: a military coup under Douglas MacArthur, an empire built mostly through diplomatic threats rather than war, and a catastrophic USSR invasion that unravels it all.

1. Let MacArthur crush the rebellion, then take power in the coup setupA northeast-and-west-coast rebellion (the "Constitutional States of America") gives MacArthur enough popularity to oust the president. 21:13
2. Absorb Canada, Mexico and the rest of North America diplomatically cheapNegotiation and the threat of force, not invasion — Canada's army is tied up fighting Germany, Mexico has no one to call for help. 22:15
3. Threaten the British PM directly for Pacific holdings cheapCanada, New Zealand, Australia, Malaya, Hong Kong and Gibraltar transfer without a shot fired — Britain is stretched thin against Germany. 22:59
4. Finish Japan with a navy-first approach grindDestroy their navy, then invade — done in under two months. 23:44
5. Don't skip equipment upgrades before a war this big skipMacArthur goes into the 6-million-strong Soviet invasion still using years-old tank and division designs — the direct cause, the video says, of the encirclement disaster that follows. 25:50

The deployment queue, the only division-related screen in the video: MacArthur's "Old Ass 1940 Tank Division" (width 14) next to a wall of Motorized Divisions at New England, and the full template list — National Guard Division, Cavalry Division, Garrison Brigade, Marine Brigade, the tank division, Anti-Air 1938 A, Local Volunteers, Exiles, Free Corps. None opened in the Division Designer, so no stats are visible.

After his empire collapses and he's exiled, then retakes the undefended country with a handful of cavalry divisions, MacArthur's last card is a nuclear facility at Waterloo, Iowa — 100 days from a bomb when the timer starts. The coalition arrives with 10 days left and takes the facility one day before completion.

Confederacy: a second civil war, a new leader, a German alliance

The shortest and least mechanical path. After a second, separate civil war, a German-born architect referred to as "Adam Hilt" wins the leadership contest and reorients the country as the Confederate States of America.

1. Let the post–civil-war leadership event resolve to Adam Hilt setupOut of several candidates, the German-born architect wins and renames the country Confederate States of America. 30:09
2. Take the British Empire while it's already fighting a three-way war cheapBritain is fighting communists and the central powers at once by this point, so conquest here is presented as easy regardless of who's doing it. 30:31
3. Join the German Reich against the Comintern grindA multi-year war ends with Paris and Moscow both falling, then Hilt lets Germany take the entire peace settlement. 31:32

Lend-lease as the USA: what it costs and what it buys

The five runs above are five stories. The three sections that follow are the mechanics all five of them are standing on, and the first is the one that lets a neutral United States fight a war it has not joined.

Lend-lease is available to any country at peace, sending to any non-enemy country currently at war — which is the entire American opening described in one rule. You need no war goal, no declaration and no faction to arm the Allies for years.

That last row is the one that catches people out. The convoys are the recipient's problem, not yours: a Britain that has lost its convoys to submarines does not receive what you shipped, and nothing in the interface explains that away. If a lend-lease looks like it is going nowhere, check the other country's convoy count before you look at your own production lines.

There are three ways to set one up, all in the Recruit & deploy window: a single shipment of a stated amount, a standing monthly amount, or a percentage of monthly production. Shipments arrive once per month, so a lend-lease opened on the day war breaks out delivers nothing for up to four weeks. Any of it can be changed or cancelled at will.

Lend-lease also answers a problem the American economy creates for itself. Every equipment upgrade leaves a stockpile of obsolete rifles, guns and trucks your own divisions no longer want, and shipping those out costs nothing you were going to use. Send the old model, keep the new one.

Garrison, occupation and resistance for a conquering USA

Two of the paths above end up occupying most of a hemisphere, and the bill for that arrives as garrison. It is easy to underestimate, because garrison divisions are not drawn on the map at all — they are allocated automatically and equipped automatically from the template you set in the Recruit & deploy dialog. A bad garrison template is an invisible, permanent tax on equipment production.

The requirement scales with resistance: for every point of resistance, the occupier needs 0.75 points of suppression in each state. Below 10% resistance the requirement stays at the 10% level rather than falling further, and above 50% it stops climbing.

The resistance target starts at a base of 35%, and the occupation law is the main lever on it:

That last row ties the mechanic straight back to the paths above. Brutal Oppression is the cheapest answer to resistance in the game and a democratic United States never gets to use it, so the neutral and interventionist runs pay for their conquests in garrison divisions where the fascist run pays for them with a law change. It is one of the few concrete, mechanical arguments for an ideology switch that the runs above make for narrative reasons.

The payoff for keeping resistance down is compliance, which starts at 0% in every occupied state and is what actually returns the territory's industry to you — factories available work out as 100% - 75% + 65% x compliance level. An occupation sitting at zero compliance produces almost nothing for you, however large it looks on the map.

Pacific war strategy: how the USA beats Japan

An HOI4 USA vs Japan war is not won by the landings. It is won by the two things that have to be true before a landing is possible at all: supremacy at the moment of launch, and a port that can feed whatever you put ashore.

Naval supremacy. A naval invasion needs more than 50% naval supremacy in every strategic region the divisions cross — but only for the moment it launches. After that the invasion proceeds whether or not you still hold the sea, although the convoys carrying it can be intercepted by enemy fleets and bombers on the way. That asymmetry is why the interventionist run above spends so long locating and sinking the enemy fleet before anything moves: you do not need permanent control of the Pacific, you need one clean window.

How much you can land, and how long it takes. The base game allows 4 divisions per invasion order and 1 plan being prepared at a time. Technology raises both:

Preparation time scales with the size of the landing: on base technology a 1-division invasion takes 7 days and a 10-division invasion takes 70 days, with later technologies cutting between 10 and 30 days off. Island-hopping with small stacks is therefore quick, and a single decisive landing is a two-month commitment that has to be made two months in advance — plan the big one before you think you need it.

Supply is the real ceiling. A port acts as a supply hub, and its throughput is set by its level: 8 supply at level 1, then 11, 14, 17, 20, 23, 26, 29, 32, and 35 at level 10. That, not the size of the beach, is what limits how many divisions an island will hold. A port supplies by sea as long as it can trace convoys and other ports back to your capital, so an island chain is a chain of ports and a broken link starves everything behind it.

Units and focuses. Marines carry +30% Breakthr. and wet-terrain bonuses, and the special forces cap is set by how many non-special-forces battalions you have deployed — the one place the American manpower pool is an unambiguous advantage, since a huge line-infantry army is what pays for the marine battalions. On the focus side, MAGIC sits behind Focus on Asia and grants a spirit with Spotting Chance: +20%, which is exactly the find-their-fleet-first problem; Two Ocean Navy Act supplies the dockyards to build what does the finding.

Division templates

The video never opens the Division Designer, so soft attack, breakthrough, organization and IC cost aren't available for any template — only names and the one width value shown. Treat the blanks as genuinely unknown, not zero — the defensive division templates guide shows a template with real stats, and soft attack and modifier stacking explains why that number matters more than width.

Best USA division templates: the constraints behind the numbers

The section above is what this particular run deployed, with the stats genuinely unavailable. This one is the part that does not change between playthroughs — the constraints any HOI4 USA division template has to answer, and where the American ones differ from everybody else's.

Width is a terrain question, not a preference. Combat width is the number of battalions that can fight in a province, and it is set by the terrain rather than by a rule of thumb:

Read that as arithmetic rather than as a verdict. A 25-width division fits mountain and marsh exactly twice and leaves 20 spare in plains; a 20-width fits everything on the table without remainder except forest and jungle, where it leaves nothing; a 40-width fits urban twice and overflows mountains on its own. Attacking from a second direction adds the figure in the right-hand column, so a template that overflows a mountain frontally stops overflowing it the moment a second army joins — which is why "best width" answers differ so violently between players fighting on different maps.

The American constraint is manpower, not factories. Every other major has to ask whether it can build the equipment; the 1936 United States has to ask whether it can find the men, because The Great Depression is running Recruitable population Factor: -50% until the economic branch replaces it. That makes the recovery order above a template decision as much as an economic one: wide, expensive divisions before Agricultural Adjustment Act and Fair Labor Standards Act have landed are divisions you cannot reinforce.

The support companies with published, unambiguous numbers are worth choosing on purpose rather than by habit:

Two of those are close to mandatory for the campaigns on this page specifically. Field Hospital returns manpower to a country whose manpower is halved for the first several years, and Logistics matters more the further a division is from a railhead — which, for a United States fighting in Europe and the Pacific at once, is always.

Special forces are bought with ordinary infantry. The number of marine and mountaineer battalions a country may field is capped against the total number of non-special-forces battalions it has deployed, so the marines the Pacific section wants are paid for by the size of the line army rather than by a separate budget. Marines carry +30% Breakthr. and wet-terrain bonuses; mountaineers carry the same breakthrough figure with rugged-terrain bonuses instead.

Garrison templates are the exception to everything above — they never fight a front, so width and breakthrough are irrelevant to them and cost per unit of suppression is the only thing that matters. That template is covered in the garrison section further up.

Ship production (Path 2)

The closest the video gets to an equipment designer — the queue names hull classes and dates but never opens the module/loadout screen, so "cost" here is the build-cost icons on the card, not a verified IC-per-day figure. The navy guide covers fleet composition and design in depth.

Not verifiable here: division/equipment stats (soft attack, breakthrough, org, IC cost), the second unlabeled ship cost icon, which air-wing total (290/782/610/508) maps to which category, and any patch/version number.

Sources

AtlasProductions, "Every Way To Play The United States In Hearts of Iron 4," 32:21. Top comments (by like count, root-level) were pulled from the video for the disagreements and additions above.