1.19.2|Jun 25, 2026
View on Steam↗HOI IV | Open Beta Weekend (1.19.2)
2/5 Minor
BETAOpen Beta 1.19.2 introduces the Australasia formable nation and extensive balance adjustments for Australia, Indonesia, and Siam.
Key Changes
- 1Open Beta 1.19.2 'Operation Postern' launch for weekend testing
- 2New Australasia formable nation added for Australia
- 3Fixed 'Spirit of St. Bernard' exploit allowing 105% casualty trickleback
- 4Significant stability and OOS fixes for late-game multiplayer and MIOs
- 5Extensive rebalancing of Siam's starting stability, tank designs, and compliance gains
- 6Rebalanced Australian Air Branch and 'Citizen Army' national spirit
- 7Fixed exploit allowing Indonesia to gain 7 research slots
- 8Added new event sound toggle for scripted speeches
- 9Fixed spearhead and offensive line orders not advancing properly
- 10Improved AI logic for UK refineries, US home defense, and Japanese naval invasions
All Changes
🎯National Focuses & Decisions(12)
- newAustralia: Added the Australasia formable nation
- buffAustralia: Focus 'Reclaim the Lost Territory' now transfers all land, naval, and air forces to Australia
- changeAustralia: Focus 'Singapore Strategy' is now available if either ENG or AST controls Singapore
- buffAustralia: Focus 'Alice Springs' duration reduced to 35 days
- newIndonesia: New releasable nations in Indonesia gain access to Nusantara/Greater Indonesia formable decisions
- buffIndonesia: Netherlands-Indonesia union can now take most Dutch economic focuses from the joint tree
- newDutch East Indies: Added a small naval branch for the Dutch East Indies joint tree available during peacetime
- changeIndonesia: Added decision to move capital to Amsterdam or Batavia for the Netherlands-Indonesia Union
- newSiam: New focus in Pan-Thaiism branch allows ending Khana Ratsadon factionalism if approval is maintained for 270 days
- newSiam: Added 'King of the White Elephant' movie poster decision providing weekly stability
- buffSiam: Seri Thai civil war can now be avoided if combined strength is over 80%
- buffSiam: Removing agricultural tax now grants a one-time industry tech bonus
⚖️Balance(11)
- nerfExpeditionary Leader: Expeditionary Leader trait Non-Core Attack and Defence reduced from +15% to +10%
- nerfSpirit of St. Bernard: Tuned down 'Spirit of St. Bernard' to prevent 105% casualty trickleback and 'zombie Swiss' armies
- changeIndonesia: Feint uprisings manpower cost increased from 2500 to 5000; infantry equipment cost reduced from 2500 to 1500
- nerfAustralia: Non-Core Attack/Defence values on 'Australian Military Forces' National Spirit reduced by roughly half
- buffAustralia: Citizen Army penalty to non-core Attack and Defence reduced from -25% to -15%
- nerfAustralia: Australian Air Branch rebalanced with decreased mission efficiency
- buffSiam: Starting stability increased from 19% to 29%
- nerfSiam: 'Unconventional Tank Designs' build cost reduction nerfed from -15% to -10%
- changeSiam: 'Unconventional Tank Designs' reliability penalty removed and replaced with -5% Soft Attack penalty
- nerfSiam: Compliance gain from full Civilian support and 'Built to Withstand Every Flame' focus reduced from 10% to 5%
- nerfSiam: Asian Democratic Compact bonuses reduced by average of 1% per faction member
🤖AI(5)
- changeItaly: Introduced historical fighter designs for AI production
- changeGermany: Introduced intermediate plane variants for improved small airframes
- changeUnited Kingdom: UK AI will build more synthetic refineries to safeguard rubber supply
- changeUSA: Added home guard defense logic to protect the continent from Axis threats
- changeJapan: Japan is now more likely to naval invade Borneo
🛠️Stability & Performance(4)
- fixStability: Fixed a crash occurring when calling 'gain_xp' command on a fleet without an Admiral
- fixStability: Fixed a crash when assigning a deployed Field Marshal to an Army Group
- fixMultiplayer: Fixed a late-game out-of-sync (OOS) error caused by Military Industrial Organizations (MIOs)
- fixMultiplayer: Fixed an OOS issue when joining a historical MP game after playing an ahistorical game in the same session
🖥️UI & UX(5)
- newAudio: Added a new event sound tickbox to enable/disable scripted event sounds like speeches
- newMap: Added dams to the States and Construction mapmodes
- changeUI: Division Designer click-shortcuts now apply to HQ templates
- changeUI: Tooltips now show all manpower modifiers even if they sum to a neutral number
- buffUI: Divisions with multiple active commander abilities now display all of them
🐛Bug Fixes(9)
- fixGameplay: Fixed an exploit where army disbanding with a deployed HQ was possible
- fixJapan: Fixed Japan being discouraged from joining the Axis after being defeated in war
- fixAustralia: Fixed 'World Peace' focus incorrectly allowing volunteers to Spanish Nationalists instead of Republicans
- fixIndonesia: Fixed an issue where Indonesia could gain 7 research slots by siding with Japanese invaders after completing 'The Industrialized Colony'
- fixGameplay: Fixed spearhead and offensive line orders failing to advance to destination tiles
- fixMultiplayer: Fixed 20+ player lobbies struggling with new connections
- fixEquipment: Fixed Regimental Support Rocket Battery incorrectly affecting division speed
- fixUI: Fixed over 40 localization errors, typos, and missing icons across Australia, Indonesia, and Siam focus trees
- fixNational Focuses: Fixed various focus bypass and requirement issues for the UK, Netherlands, and Ethiopia
📅Coming Soon(1)
- changeFuture Update: A wider balance pass is planned for next week following player feedback from this beta
Summary
Hearts of Iron IV enters an Open Beta weekend for version 1.19.2 (Operation Postern). While the developers noted a lack of 'massive' balance overhauls, this update provides a high volume of specific refinements for Southeast Asian nations and Australia. Key highlights include the addition of the Australasia formable nation, a fix for the 'zombie Swiss' casualty trickleback exploit, and significant stability improvements for late-game multiplayer sessions.