June 6, 1944 – D-Day began  

D-Day – 6 June 1944 – was the largest amphibious invasion in the history of warfare. The statistics of D-Day, codenamed Operation Overlord, are staggering. The Allies used over 5,000 ships and landing craft to land more than 150,000 troops on five beaches in Normandy. The landings marked the start of a long and costly campaign in north-west Europe, which ultimately convinced the German high command that defeat was inevitable. 
10 Facts About D-Day You Need To Know | Imperial War Museums (iwm.org.uk)

D-Day, 06.06.44, Juno Beach, Normandy
Issued by Canada Post in 2004
Designer: Derwyn Goodall

Remember, fighting fascists is good for your country’s health and your sanity.  

Invasion! | Canadians and the battle of Normandy, 1944 (warmuseum.ca)