|Viet Nam Military History Museum
On January 26, 1954, General Vo Nguyen Giap changed the strategy of the campaign from "Fast Strike. Fast Victory" to "Steady Attack. Steady Advance" following approval from President Ho Chi Minh and the Politburo.
On March 13: Campaign starts and has three phases:
March 13-17: Stage 1 Attack: Infantry Divisions 312 and 308 attacked the Him Lam Hill (Beatrice), Doc Lap Hill (Gabrielle) and Ban Keo (Anne-Marie 1 and 2) in the northern stretch of the French Dien Bien Phu Entrenchment.
March 30-April 30 Stage 2 Attack: Infantry Divisions 316, 308 and 312 attack the eastern strongholds namely C1 (Eliane 1), E (Dominique 1), D and A1 (Eliane 2). Vietnamese army surrounded the strongholds, while keeping digging up new trenches to get closer to the central command headquarters as well as stops the aerial support lines of the French.
The hardest battle to win was on A1, where Vietnamese army launches three waves of attack and won over only after set exploding a 1000-kg bomb dug into the hill.
May 1st-7 Stage 3 Attack: Divisions 308, 312 and 306 attack the rest of eastern strongholds and launch final attack to capture General De Castries and his entire staff.