Step into the heart of command in Thunder at Our Gates, a Theater Pack for Hearts of Iron IV. Expand on the art of organizing a campaign with new features such as military headquarters and navy captains, as well as unique new content for nations caught between rival empires; Australia, Siam and Indonesia. 

Hearts of Iron IV: Thunder at Our Gates includes:

• Australia Focus Tree: Support your Allies across the world and hold fast as the last bastion against Japan in the Pacific, or make use of your unstable political climate to change your course entirely.

• Siam Focus Tree: Turn rival nations into pawns, exploit the great powers and carve out your own empire in Southeast Asia.

• Indonesia Focus Tree: Steer the course of Indonesia’s future; remain under Dutch rule, or seize the moment to fight for independence alone, or under a new patron.

• Military HQs : Deploy your generals where they matter. Wield local command and support your troops through synergies with updated command abilities, proximity, and new division design features.

• Ship Captains : Named captains lead your ships, where they earn skills and can be promoted to admirals to command your fleets