M12

From Call of Duty - Wiki on Neoseeker

The M12 Gun Motor Carriage is a self-propelled gun designed by the United States military during the Second World War.

In Game

The main objective in the first and third Aachen level is to destroy several fortified German positions in the town. The player must protect the Gun Carriage from German Anti-Tank crews as they escort it through it's mission through town. If it is destroyed, the mission will fail.