In rapid order, Germany defeated Denmark, Norway, the Netherlands, Belgium, and then France. It threatened the final Allied stronghold, Britain. There the Canadian army contiued to mobilize.
Invasion of France and the Low Countries: 10 May-4 June 1940
Canadian Destroyers in the English Channel: 28 May-30 June 1940
Corvettes for the Royal Canadian Navy: June 1940
Canadian 1st Infantry Brigade in France: 13-18 June 1940
1st Canadian Division in Britain-"McNaughton's Flying Circus": July 1940
CPR Air Services Department: July 1940
Battle of Britain: 1 Aug-17 Sept 1940
Ogdensburg Agreement: 17 Aug 1940
Royal Canadian Air Force Squadron Number 1: 24 Aug 1940
Royal Air Force Squadron Number 242-the "Canadian Squadron": Summer 1940
Royal Canadian Navy Convoy Escorts: Sept-Dec 1940
"Destroyers-for-Bases": 5 Sept 1940
British Commonwealth Air Training Program-First Pilots: 30 Sept 1940