The Strategic Map of Europe on D-Day
Because of Operation Fortitude, historians say that 90 German divisions were frozen in place, well distant from the action that was to occur in the Normandy area on D-Day. This includes:
13 divisions of German soldiers protected atgainst an Allied invasion through Scandinavia. A German division comprised somewhat less than 10,000 soldiers, so one may estimate 100,000 or so German combat personnel were stationed in Norway. Keep in mind that the Allies did not land much more than this number of people at Normandy on D-Day.
In addition, 90,000 German naval personnel and 60,000 Luftwaffe personnel were stationed in Norway.
The Germans held 60 divisions in France on June 6, 1944. It would take seven weeks after D-day to get 40 Allied divisions into France.
Source: D-Day, by Stephen Ambrose.
Map of Europe on D-Day (from National Geographic site).
See this page for an overview of D-Day Strategy
Notes on Military Size of force
US, British, Canadian infantry division in WW2 – 15,000 to 20,000 strong on D-Day
Airborne divisions half that size
German division: less than 10,000
Squad – 9 to 12
Platoon – 3 or 4 squads – about 40
3-4 platoons to a company – about 125
3-4 companies to a battalion – about 500
3-4 battalions to a regiment – about 2,000
Division includes all the non-combat people