Abstract: A locking mechanism for immobilizing tracked vehicles comprises a first bar for extending between the treads of a tracked vehicle. A second bar, affixed at one end to the first bar, extends parallel to the first bar and passes through slots in a plate on the tracked vehicle, the plate being positioned on the opposite side of the track as the treads. A rotatable member is affixed to the first bar at a distance from the second bar, and has an orifice therethrough. A lockable bar passes through slots in the plate and then through the orifice in the rotatable member. The lockable bar has an enlarged portion to prevent it from being passed through the orifice in a first direction. A lock attaches to the remaining end of the lockable bar to prevent the bar from passing through the orifice in the opposite direction.