: You must build an Intel Network in the target country first. Once the network is strong enough, you can launch the "Prepare Collaboration" operation from the Operations tab. 3. Naval Invasion Preparation
Units assigned to a (front line and offensive line) automatically accumulate a "planning bonus" over time.
: The time required depends on your technology and the number of divisions assigned (e.g., a 10-division invasion takes much longer to prepare than a 1-division one).
: When you eventually execute the plan, these units receive a combat bonus (attack and breakthrough) based on how well-prepared they are.
: You will see a countdown on the general's order icon. The plan can only be activated once this timer reaches zero. 4. Field Marshal Edition v1.12.7 Details
If you have the La Résistance DLC (included in some versions of the Field Marshal Edition), your spies can run the operation.
Paradox Interactive Releases “Hearts of Iron IV” - Player Theory
Download-hearts-of-iron-iv-field-marshal-edition-v1-12-7-p2p May 2026
: You must build an Intel Network in the target country first. Once the network is strong enough, you can launch the "Prepare Collaboration" operation from the Operations tab. 3. Naval Invasion Preparation
Units assigned to a (front line and offensive line) automatically accumulate a "planning bonus" over time. download-hearts-of-iron-iv-field-marshal-edition-v1-12-7-p2p
: The time required depends on your technology and the number of divisions assigned (e.g., a 10-division invasion takes much longer to prepare than a 1-division one). : You must build an Intel Network in
: When you eventually execute the plan, these units receive a combat bonus (attack and breakthrough) based on how well-prepared they are. Naval Invasion Preparation Units assigned to a (front
: You will see a countdown on the general's order icon. The plan can only be activated once this timer reaches zero. 4. Field Marshal Edition v1.12.7 Details
If you have the La Résistance DLC (included in some versions of the Field Marshal Edition), your spies can run the operation.
Paradox Interactive Releases “Hearts of Iron IV” - Player Theory