With the exception of the Côn Đảo islands, all of Bà Rịa–Vũng Tàu province was once a part of Đồng Nai Province to the north. In 1979, Vũng Tàu was broken away from Đồng Nai and merged with the Côn Đảo islands (formerly part of Hậu Giang Province), forming the new Vũng Tàu–Côn Đảo "special zone". Later, in 1992, Bà Rịa broke away from Đồng Nai Province, merging with Vũng Tàu–Côn Đảo to form the modern province of Bà Rịa–Vũng Tàu.



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