sentences:  These were the U.S. 509th Parachute Infantry Battalion and U.S. 517th Parachute Regimental Combat Team, and the British 2nd Independent Parachute Brigade.Added to them were the U.S. 550th Glider Infantry Battalion and U.S. 551st Parachute Infantry Battalion, both of which had previously been stationed in Panama, and neither of which had seen combat.Two Free French parachute battalions had originally been assigned in early July, but disagreements over their deployment with General de Gaulle meant that the troops were not made available, and so the British 2nd Parachute Brigade was assigned to the operation on the proviso that they would be returned to operations in Italy once the beachhead was firmly established.