After World War II ended, the French army returned to invade Vietnam and quickly expanded the war to the whole Indochina peninsula including Laos and Cambodia. The French army and Viet Minh forces carried out a war lasting 9 years. Since 1950, Viet Minh received strong support from China and the Soviet Union, so it quickly carried out a series of large-scale military campaigns, causing the French army in Vietnam have many difficulties. France constantly changed the generals who commanded the war in Vietnam and the last commander was Henri Eugène Navarre. Henri Eugène Navarre went to the battlefield of Vietnam with the hope of ending the war with honor and favor for France. That is why he devised a military plan named after himself, the Navarre plan. However, this plan encountered great material challenges and the Viet Minh's will to resist, so it failed at Dien Bien Phu. In Geneve, France had to sign a peace agreement, leave Vietnam, and end more than 80 years of rule in this country.