I just ran across this documentary. It uses archival film, possibly colorized, to illustrate various events in WW2. I learned that German armored forces and pilots made use of pervetin, a methamphetamine, during the 1940 invasion of France and the Low Countries in order to go without sleep during Blitzkrieg. Also the Allies missed a war changing opportunity to bomb a miles long German military traffic jam backed up into Germany itself that was lined up to go through the Ardennes, opposite Sedan. General Gamelin would not believe the reports of his own scout pilots.