Vo Thi Sau (1935-1952), real name Nguyen Thi Sau, was a 17 year old heroine and patriot executed by French firing squad, March 13, 1952, just seven years after metropolitan France had been liberated from Nazi occupation. She was arrested in 1950, aged 15 years, for throwing a hand grenade in the market at Dat Do which killed three French soldiers. She was sent to Con Dao Prison island where she was executed by the occupying forces. Vo Thi Sau was posthumously awarded the title Hero of the People's Armed Forces.

The Con Dao Islands (Vietnamese: C繫n ?廕υ) are an archipelago of B? R廙???觼ng T?u Province, in southeastern Vietnam, and are a district of this province. Situated at about 185 km (115 mi) from V觼ng T?u and 230 km (143 mi) from H廙?Ch穩 Minh City (Saigon), the group includes 16 mountainous islands and islets. The total land area is 75 sq km, and the local population is about 5,000. The island group is served by C廙?廙g Airport.

The archipelago was formerly known as Poulo Condore, and it is mentioned under a variant of this Malay name by Marco Polo in the early 14th century. On June 16, 1702, the English East India Company founded a settlement on the island of 'Pulo Condor' off the south coast of southern Vietnam, and on March 2, 1705, but the garrison and settlement were later destroyed during a mutiny by the Malay mercenaries employed by the English.

The largest island is C繫n S??n Island (also known as Con Lon Island), infamous for its numerous prisons - eleven in all - built by the French colonial government. It was also used as a prison island after independence in 1954, by the pro-Western Republic of Vietnam regime, acquiring a fearsome reputation for isolation and brutality as well as - conversely - functiong as a de facto insurgent 'university', where many leading nationalist and communist Vietnamese were imprisoned.

In 1984, the archipelago became a protected area, C繫n ?廕υ National Park, wh