 The pact called for the withdrawal of American forces, a complete ceasefire from all parties, the release of prisoners of war, and no further invasions. Well, the Communists broke the agreement almost immediately. They stormed South Vietnam for the next two years, seizing control of Saigon, the capital, April 30, 1975. And here's something else you might not know. Today, the unified country of Vietnam is completely dominated by the Communist Party.