631 - Emperor Taizong of Tang, the Emperor of China, sends envoys to the Xueyantuo bearing gold and silk in order to seek the release of enslaved Chinese prisoners captured during the transition from Sui to Tang from the northern frontier; this embassy succeeded in freeing 80,000 Chinese men and women who were then returned to China.
1865 - The Naval Battle of the Riachuelo is fought on the rivulet Riachuelo (Argentina), between the Paraguayan Navy on one side and the Brazilian Navy on the other. The Brazilian victory was crucial for the later success of the Triple Alliance (Brazil, Uruguay, and Argentina) in the Paraguayan War.
1963 - American Civil Rights Movement: Governor of Alabama George Wallace defiantly stands at the door of Foster Auditorium at the University of Alabama in an attempt to block two black students, Vivian Malone and James Hood, from attending that school. Later in the day, accompanied by federalized National Guard troops, they are able to register.