Operation Hirondelle took place during the French Indochina War in July 1953. It was an airborne raid on Viet Minh

Viet Minh

Việt Minh was a national independence coalition formed at Pac Bo on May 19, 1941. The Việt Minh initially formed to seek independence for Vietnam from the French Empire. When the Japanese occupation began, the Việt Minh opposed Japan with support from the United States and the Republic of China...

 supply depots near Lang Son

Lang Son

Lạng Sơn , sometimes Langson, is a city in far northern Vietnam, is the capital of Lang Son province. It is accessible by road and rail from Hanoi, the Vietnamese capital, and it is the northernmost point on National Road 1A.-History:...

, involving parachute

Parachute

A parachute is a device used to slow the motion of an object through an atmosphere by creating drag, or in the case of ram-air parachutes, aerodynamic lift. Parachutes are usually made out of light, strong cloth, originally silk, now most commonly nylon...

 units of the French

French Army

The French Army, officially the Armée de Terre , is the land-based and largest component of the French Armed Forces.As of 2010, the army employs 123,100 regulars, 18,350 part-time reservists and 7,700 Legionnaires. All soldiers are professionals, following the suspension of conscription, voted in...

 and Vietnamese National Armies

Vietnamese National Army

On March 8, 1949, after the Elysee accords, the State of Vietnam was recognized by France as an independent country ruled by Vietnamese Emperor Bảo Đại. The Vietnamese National Army or Vietnam National Army was the State of Vietnam's military force created shortly after that. It was commanded by...

. Raids near the junction of Colonial Road's Four and One revealed caches hidden in caves, which were photographed and destroyed.

The attack forces then retreated over land through Loc Binh, where other French units had been dropped on July 17 to repair and hold a river crossing for the retreating units; and then to form a rearguard for 20 miles. The entire force rendezvoused with Mobile Group Five, and was then extracted by sea on July 19, suffering from heat exhaustion. The average weight loss was 11 pounds.