Final answer:
Vietnam was divided at the seventeenth parallel post-French colonial rule, with a communist government in the North and an anti-communist government in the South. The North aimed to reunify Vietnam under its ideology, supporting insurgent activities and the NLF. The Vietnam War ended with the North's victory and the country's reunification in 1975 as a communist state.
Step-by-step explanation:
Following the division of Vietnam at the seventeenth parallel by the Geneva Accords in 1954, there were various efforts to reunite North Vietnam and South Vietnam. The North was led by Chi Minh, a communist leader, while the South, backed by the United States, was led by President Ngo Dinh Diem, an anti-communist. Before the planned elections could take place, Diem, with U.S. support, cancelled the elections fearing a victory by Chi Minh, which led to increased tensions and the start of the Second Indochina War, commonly known as the Vietnam War.
Efforts for reunification were characterized by the conflict between the communist ideology of the North and the anti-communist South. The North Vietnamese supported the National Liberation Front (NLF) in the South, which sought to overthrow Diem's government through an insurgency. This culminated in a full-scale war that saw the eventual withdrawal of U.S. troops, and in 1975, after North Vietnam's victory, the country was reunified under a communist government.