ディエンビエンフー
The Việt Minh force grew significantly with China's assistance and in 1954, under the command of General Võ Nguyên Giáp, launched a major siege against French bases in Điện Biên Phủ. The Việt Minh force surprised Western military experts with their use of primitive means to move artillery pieces and supplies up the mountains surrounding Điện Biên Phủ, giving them a decisive advantage. On May 7, 1954, French troops at Điện Biên Phủ, under Christian de Castries, surrendered to the Viet Minh and in July 1954, the Geneva Accord was signed between France and the Viet-Minh, paving the way for the French to leave Vietnam.