Hungary and Slovakia declare war on the Soviet Union
German troops cross the Bug River
Syria
British troops reach Palmyra
Books
Traditional Enemies - Britain's War with Vichy France 1940-1942, John D Grainger. Looks at the series of battles between Vichy France and Britain between the fall of France in 1940 and Operation Torch at the end of 1942. Politically well balanced, acknowledging the genuine motives behind each British attack and the difficult balancing act the Vichy government was attempting but failing to pull off, and with good accounts of the military actions. [read full review]
How to cite this article: Rickard, J (28 December 2007), 23 June 1941, https://www.historyofwar.org/secondworldwar/date/1941_06_23.html