If you can successfully quell the uprising, you’ll gain control of the city, as well as full access to Poland’s naval branch of the focus tree. The ‘Clamp Down on Danzig’ focus will form the start of a focus new tree, allowing Poland to lay claim to the city-state, at the risk of sparking a rebellion. No longer providing access to its factories, manpower, and resources, Poland will be granted the pernicious ‘Embargoed Economy’ trait to reflect its naval isolation. To better align with its historical independence, The Free City of Danzig will begin each Hearts of Iron 4 game as a demilitarized zone, instead of a region controlled by Poland.
The most notable change is the importance of Danzig, and its role in Poland’s international connectivity. Release dates for the update and DLC are yet to be announced. Revealed in a dev diary posted to the Paradox Forum earlier today, the update will introduce an entirely new tree, with additional and expanded branches, bringing major political reworks, changes to the independence of Danzig, and a historical Peasant’s Strike event.
Hearts of Iron 4’s upcoming free Barbarossa update and as-yet-unannounced DLC will majorly rework Poland’s national focus tree.