Historical Events on April 22

18 significant historical events occurred on April 22. April 22 is notable for various historical events. In 1809, the Battle of Eckmühl took place during Napoleon's campaigns. The London Naval Treaty, which set regulations for submarine warfare and naval construction, was signed in 1930. More recent events on this date include the 2007 French presidential election and the 2012 Bahrain Grand Prix Formula One race.