The Battle of Trapani took place on 23 June 1266 off Trapani, Sicily, between the fleets of the Republic of Genoa and the Republic of Venice, as part of the War of Saint Sabas (1256–1270). During the war, the Venetians held the upper hand in naval confrontations, forcing the Genoese to resort to commerce raiding and avoiding fleet battles. In the 1266 campaign, the Genoese had an advantage in numbers, but this was not known to the Genoese commander, Lanfranco Borbonino. As a result, the Genoese tarried at Corsica until the end of May. The Venetian fleet under Jacopo Dondulo was left to sail back and forth, awaiting the appearance of the Genoese fleet in the waters around southern Italy and Sicily. Fearing that the other side had more ships, both sides reinforced their fleets with additional ships, but the Genoese retained a small numerical advantage.
Croatian War of Independence: The Battle of the Miljevci Plateau ended after a failed counterattack by forces of the Republic of Serbian Krajina against the Croatian Army who had captured the plateau.
Chinese American Vincent Chin died after being beaten into a coma in Highland Park, Michigan, U.S., by two automotive workers who were angry about the success of Japanese auto companies.
The Los Angeles Dodgers started Steve Garvey, Davey Lopes, Ron Cey, and Bill Russell in the infield, beginning a record eight-year run in Major League Baseball for four people designated as starters for those positions.
President Richard Nixon signed Title IX (co-author Patsy Mink pictured) into law as part of the Education Amendments, prohibiting gender discrimination in any educational program receiving U.S. federal funds.
The Holocaust: After a closely supervised visit to Theresienstadt Ghetto in German-occupied Czechoslovakia, Red Cross official Maurice Rossel reported that conditions there were "almost normal".
The College Board administered the first Scholastic Aptitude Test, a major standardized test for university and college admissions in the United States.
On the First Sunday after Trinity, J. S. Bach led the first performance of Brich dem Hungrigen dein Brot, BWV 39 (page pictured), one of a few new cantatas written that year.
Anglo-Spanish War: During the Action of Faial, an English attempt to capture a Portuguese carrack, reputedly one of the richest ever to set sail from the Indies, caused it to explode with all the treasure lost.
