China gains control over all the Paracel Islands after a military engagement between the naval forces of China and South Vietnam.

The Paracel Islands, also known as the Xisha Islands and the Hoàng Sa Archipelago, are a disputed archipelago in the South China Sea and currently controlled by the People's Republic of China.

The Battle of the Paracel Islands was an engagement between the Chinese and South Vietnamese navies near the Paracel Islands on January 19, 1974. The battle was part of an attempt by the South Vietnamese navy to remove the Chinese navy from the area towards the end of the Vietnam War.

South Vietnam, officially the Republic of Vietnam, was a country in Southeast Asia that existed from 1955 to 1975. It first garnered international recognition in 1949 as the associated State of Vietnam within the French Union, with its capital at Saigon. Since 1950, it was a member of the Western Bloc during the Cold War. Following the 1954 partition of Vietnam, it became known as South Vietnam and was established as a republic in 1955. South Vietnam was bordered by North Vietnam to the north, Laos to the northwest, Cambodia to the southwest, and Thailand across the Gulf of Thailand to the southwest. Its sovereignty was recognized by the United States and 87 other nations, though it failed to gain admission into the United Nations as a result of a Soviet veto in 1957. It was succeeded by the Republic of South Vietnam in 1975. In 1976, the Republic of South Vietnam and North Vietnam merged to form the Socialist Republic of Vietnam.

January 20 is the 20th day of the year in the Gregorian calendar; 345 days remain until the end of the year.