Mars-la-Tour is a commune in the Meurthe-et-Moselle department in northeastern France. The Battle of Mars-la-Tour was fought on 16 Au…Mars-la-Tour is a commune in the Meurthe-et-Moselle department in northeastern France. The Battle of Mars-la-Tour was fought on 16 August 1870 during the Franco-Prussian War near the town of Mars-la-Tour.