A Motion to Sever covers Operation Lüttich, a German offensive near Mortain in August 1944. The 21"x17" map is made from two sections and has a scale of one mile per hex. There are 244 uncut counters. Units are mostly battalions. Turns are twelve hours. Turns follow a sequence of twelve phases including American air attacks, German artillery barrages, standard movement and combat, exploitation, and camouflage. In the latter phase German stacks can attempt to camouflage themselves under certain conditions, which helps protect them from air attacks. Camouflaged units move more slowly and cannot attack. The combat system is quite complex with many different types of modifiers and column shifts (terrain, combined arms, different armor types, etc.) and a wide range of possible effects. There is a nine-turn campaign game and several shorter scenarios.