Historical Events on July 20

22 significant historical events occurred on July 20. July 20 has seen significant events throughout history, including military conflicts, political upheavals, and diplomatic agreements. Notable events on this date include the 1866 Battle of Lissa, the first major naval clash between ironclad ships, the 1932 Prussian Coup that undermined the Weimar Republic, and the unsuccessful 1944 attempt to assassinate Adolf Hitler. The date also marks the signing of the Reichskonkordat between Nazi Germany and the Vatican in 1933.