Their roles were defined as follows: to protect the sovereignty of the free Vietnamese nation and that of the Republic; to maintain the political and social order and the rule of law by providing internal security; to defend the newly independent Republic of Vietnam from external (and internal) threats; and ultimately, to help reunify Vietnam – divided since the Geneva Accords in July 1955 into two transitional states, one at the north ruled by Ho Chi Minh’s Marxist Lao Dong Party regime and the other in the south under Diem’s anti-communist regime.