The speed at which War Exhaustion accumulates is influenced by factors such as ethics, traditions, technology and the amount of claims being pressed. It goes up from having planets and starbases occupied by the enemy, suffering losses during combat, and passively by attrition.
Starbases replace spaceports in military ship construction. They can be upgraded, ranging from outpost to citadel, and further specialized with modules and buildings.
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These features will be added to the base game on the 2.0 (Cherryh) patch meaning that they are free for all players and function without the need of the accompanying DLC.