Romania will be able to spend political power on regional cooperation bonuses in Hearts of Iron IV, with access to agreements with Hungary and Bulgaria depending on national focuses or faction membership. The November 3, 2026 dev diary also details military development and Romania’s communist and democratic political paths.
Regional cooperation has a political cost
The official dev diary describes a tiered cooperation system in which each level grants predetermined bonuses. Players pay political power to reach a tier, followed by a lower upkeep cost to maintain it. The choice therefore involves both the initial investment and an ongoing claim on political power.
Cooperation with Hungary and Bulgaria is locked until Romania completes certain national focuses or belongs to the same faction as the country concerned. Political power alone will not unlock those agreements: access also depends on the focuses Romania pursues or the alliances it joins.
Foreign tanks, aircraft and a river fleet
Romania’s military branch includes a national spirit that improves as military focuses are completed. Its modifiers eventually become entirely positive, making the sequence of military development relevant beyond the individual rewards of each focus.
The branch also lets Romania buy small quantities of foreign tanks and study their designs for research bonuses. Those purchases serve a second purpose alongside adding vehicles: they can help advance Romanian research.
In the air branch, players can pursue options to retain Polish aircraft designs or invest in jet engine research with the help of Henri Coandă. The naval branch includes a river terrain bonus representing a river fleet whose ships do not appear in the game.
Communists, the monarchy and Romania’s alliances
The communist path can lead to a 3-sided civil war, although that conflict is optional. The dev diary also presents a route based on converting the population democratically.
Communist Romania can prepare a militia with weapons without raising its conscription law. A penalty applies while the militia’s reserves are active, so mobilizing them carries a cost even though preparing the force does not require a change to conscription.
The democratic path allows players to weaken Carol, then reduce the monarchy’s powers while placing his son Michael on the throne. Romania can subsequently turn toward the Allies or strengthen the Little Entente; the dev diary describes opportunities for intervention under either diplomatic direction.
The political paths offer different ways to reshape Romania, while regional cooperation asks players to weigh predetermined bonuses against their political power costs. For agreements with Hungary and Bulgaria, the choice of focuses or faction also determines whether those bonuses are available at all.
See also the Hearts of Iron IV game page, our article on HOI4 patch 1.19.4: automated trade and recall of and our article on HOI4 Romania: more building slots, but.
