Topic summary

War in southern Vietnam (1945–1946)

Belligerents
Japanese Surrendered PersonnelsHòa Hảo
Cao Đài

Đại Việt Nationalist Party
TrotskyistsCommanders and leadersDouglas Gracey
Philippe LeclercHồ Chí Minh
Võ Nguyên Giáp
Trường Chinh
Nguyễn Bình

Lê Duẩn

Dương Văn Dương
Lê Văn ViễnHuỳnh Phú Sổ
Phạm Công Tắc

Nguyễn Tôn Hoàn
Tạ Thu Thâu
Phan Văn HùmStrength Unknown number of soldiers Unknown number of soldiers At least 15,000 Hòa Hảo militants
Unknown number of Cao Đài and VNQDD forces
Some 2,500 Bình Xuyên forcesCasualties and losses 40 dead
"Slightly higher than British casualties" British estimation: 2,700 dead
(600 by British forces, the rest by French and Japanese) Unknown

The 1945–1946 War in Southern Vietnam, codenamed Operation Masterdom by the British, and also known as the Southern Resistance War (Vietnamese: Nam Bộ kháng chiến) by the Vietnamese, was an armed conflict in Vietnam south of the 16th parallel during which British-Indian and French forces fought to suppress Vietnamese independence movements, which included non-communistnationalists, Trotskyists, and the Stalinist-front Viet Minh, to take control of the southern half of the country. It began shortly after the end of World War II, specifically the unconditional surrender of Japan.

Starting in Saigon on 23 September, the British began facilitating the return of the French to the half of Indochina south of the 16th parallel. Almost all Vietnamese opposed the French return in August 1945, but the Viet Minh's killings of non-communist opponents eventually pushed some groups to join the French in fighting against the Viet Minh. By March 1946, British–French forces had defeated the Vietnamese resistance, allowing the French to reassert control over southern Vietnam. Later, failed negotiations and rising tensions in the north escalated into the full-scale First Indochina War.