This remarkable series of Top Secret "situation maps," shown in slow motion time lapse, are the actual ones used by Allied 12th Army Group Headquarters to show the position of Allied and German military units in the Normandy Invasion area from D-Day June 6 through the "Breakout" across Northern France through August 25th, 1944. Standard military unit symbols are used as necessary from Battalion through Army Group HQs. The "Front Lines" are clearly shown. This gives a unique perspective on the course of events. Advances, followed by stalemates, build ups, and then advances in other areas, until front lines are blurred in the rapid dash across France to Paris & beyond. From the U.S. National Archives.