1968: The Tet Offensive began during the Vietnam War as Communist forces launched surprise attacks against South Vietnamese towns and cities. 1958: The United States entered the Space Age with its first successful launch of a satellite, Explorer 1, from Cape Canaveral. Feb. 11865: Abolitionist John S. Rock became the first black lawyer admitted to the bar of the U.S. Supreme Court. 1917: The United States broke off diplomatic relations with Germany. Feb. 41789: Electors unanimously chose George Washington to be the first president of the United States.