Mes Amis ! C'est la Guerre cards can be purchased in-game by spending a sum of dice that is 6 or greater. These cards give players advantages and/or allow you to mess with your opponents, adding a fun "Take that!" element to the game. The base game ships with its own C'est la Guerre cards. The Mes Amis deck includes new cards such as American tanks, British commandos, and Allied planes. A big help, and big fun. Mes Amis C'est la Guerre is a 9-card deck.