(military) A map showing the location of a battle and the things needed to oversee the course of the battle, including positions of troops, armaments, battlements and trenches, supply lines, etc.
December 7 2022, Simon Shuster, “2022 Person of the Year: Volodymyr Zelensky”, in Time[1]:
Inside a battle map hung on the wall, showing how the invaders had positioned themselves behind two dangerous obstacles, which they now intended to use as shields.