Four British truck companies were loaned to the Americans .
Advancing divisions of the U.S. 12th Army Group left all their heavy artillery and half their medium artillery west of the Seine , freeing their trucks to move supplies for other units .
Four British truck companies were loaned to the U.S. .
Advancing divisions of the U.S. 12th Army Group left all their heavy artillery and half their medium artillery west of the Seine , freeing their trucks to move supplies for other units .