The laws that allowed segregation to be legal in the south, making separate school, restaurant, hospitals, and cemeteries for whites and African Americans are known as Jim Crow Laws. Black Codes were laws passed in the wake of the American Civil War that restricted the rights of African Americans and enforced segregation in many parts of the country. The Tonkin Gulf Resolution was a U.S. congressional resolution passed in 1964 that authorized military action in Southeast Asia, marking the formal escalation of U.S. involvement in the Vietnam War.