Canadian Forces entered the Second World War in September 1939, after the Canadian Crown-in-Council declared war on Nazi Germany. Battles and campaigns during the Second World War that were particularly notable to the Canadian military include the Battle of the Atlantic, the Battle of Britain, the Battle of Hong Kong, the Dieppe Raid, the invasion of Sicily and Italy, Operation Overlord, the Siegfried Line Campaign, Operation Veritable, as well as the strategic bombing of German cities.