The ceasefire agreement is also known informally as the Pairs Peace Accords
in January 1973, representatives of the United States, North and South Vietnam, and the Vietcong signed a peace agreement in Paris, ending the direct U.S. military involvement in the Vietnam War. Its key provisions included a cease-fire throughout Vietnam, the withdrawal of U.S. forces, the release of prisoners of war, and the reunification of North and South Vietnam through peaceful means. The South Vietnamese government was to remain in place until new elections were held, and North Vietnamese forces in the South were not to advance further nor be reinforced.
In December 1974, the North Vietnamese broke the cease-fire and attacked the south at Phuoc Long. Despite a promise to the south that the U.S. would take retaliatory action if the north violated the peace agreement, the U.S. did not provide the south with military aid