Sunday, June 20, 1943. Race riots in Detroit, Action in the Pacific.

A three-day race riot that would result in the deaths of 34 people broke out in Detroit, starting at the Belle Island park as a fistfight.

Race riots were a feature of Detroit life for many years. The city had been a major destination during the Great Migration, given its industrial employment opportunities.

The Allies commenced the New Georgia Campaign against the Japanese.  The first action was a Marine Corps landing on the Kula Gulf on New Georgia.

The Battle of Lababia Ridge began on New Guinea, with Australians advancing on Japanese positions.  The battle would last for three days and result in an Australian victory.

Sarah Sundin noted that Oscar Holmes became the first black pilot in the U.S. Navy on this day, but only because the Navy was not aware that the light skinned Holmes was in fact black.

The Navy did discover his ethnicity later on, but by that point judged that it would have been too embarrassing to note it in any fashion.

A U.S. meteorological flight over northern Quebec discovered the The Pingualuit Crater (Cratère des Pingualuit:), formerly called the "Chubb Crater" and later the "New Quebec Crater" (Cratère du Nouveau-Québec).