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Route Coloniale 4

Operation LÉA - paratroopers of the III/1 RCP. After the bold coup-de-main assault on the Việt Minh strongholds, the fighting shifted to a grinding, frustrating hunt in terrain that favoured the Việt Minh.

⚔️🔒Operation LÉA,
(Việt Bắc Campaign), Tonkin,
Oct–Nov 1947

In the autumn of 1947, the French Far East Expeditionary Corps launched Operation LÉA, one of the most audacious operations of the Indochina War. The operation aimed to strike deep into the Việt Bắc, the mountainous sanctuary of northern Tonkin, with the explicit objective of capturing Hồ Chí Minh, dismantling the enemy’s political and military command structure, and collapsing the insurgency at its source.

Exhausted survivors of the battle greet Lieutenant Colonel Jean Simon (wearing the 'bonnet de police' and shorts) and his relief column on the evening of 28 July 1948

⚔️🔒Battle of Phủ Tông Hoá, Tonkin, 25 July 1948

The Battle of Phủ Thông Hoá was a small but significant milestone in the French Indochina War. For the French Foreign Legion, it was yet another heroic but costly defence of an isolated outpost against overwhelming odds. The battle entered Legion folklore alongside legendary stands like Camerone and Bir Hakeim. Although the Legion retained control of the post, it was abandoned a few months later as part of a broader strategic withdrawal.

For the Viet Minh, however, Phủ Thông Hoá held even greater significance. It marked the first time they had attempted a coordinated assault on a fortified French position.

Foreign Legion paratroopers in Indo-China.Route Coloniale No. 4 was a single-lane road like this, bordered by jungle and rugged terrain for most of its length.

⚔️🔒Battle of Route Coloniale 4,
(Cao Bang Ridge Disaster),
16 Sep-18 Oct 1950

The Battle of Route Coloniale No. 4 (Cao Bang Ridge Disaster) was one of the worst military defeats in the history of colonial wars, with a French force of ~6,000 troops destroyed. The battle took place along a 137km section of RC4 between Lang Son in the south and Cao Bang in the north. The French attempted to evacuate the Cao Bang garrison with support from a relief column. Both forces were destroyed in the jungle-covered mountains around Dong Khé.

⚔️🔒Operation HIRONDELLE, (Raid on Lạng Sơn), Vietnam,
17-21 July 1953

Operation HIRONDELLE, 17 July 1953. The French High Command in Indo-China, acting on time-sensitive intelligence, deployed 2000 paratroopers more than 100km behind enemy lines, destroyed a major Viet Minh logistic hub, then deployed another parachute battalion, a mechanised brigade, and a Naval task force to get them out again. All in the space of 72 hours. The operation did not change the course of the war, but demonstrated the decisivenes and agility of the French Far East Expeditionary Corps

French With Guns During Fighting Break

⚔️ Battle for Dien Bien Phu, Vietnam,
13 March – 7 May 1954

It is difficult to understand the French decision in November 1953 to insert a divisional-sized force into the remote highlands of northern Vietnam. Although the force comprised only about 5% of the French expeditionary forces in Indo-China, it was the best 5%, and ultimately included most of the available parachute battalions from the strategic reserve.