21st Army Group

Commanders

• Bernard Montgomery 1 Jan 1944 – 25 Aug 1945

Positions (approximate)

1. 6 June 1944D-Day: controls all Allied ground forces in the landing (operational area; headquarters location not given in the source)
2. 12 June 1944Normandy beachhead
3. 15 September 1944Antwerp; Market Garden 17 Sep
4. 16 December 1944Maas
5. 7 March 1945Rhine crossing 23 Mar (Plunder)
6. 25 April 1945Hamburg – Elbe

Positions are approximate sector centres on front-snapshot dates — not daily positions or headquarters. Between dates the map shows the last known position.

Sources

1. [1]
   21st Army Group

   Wikipedia (EN) · encyclopedia

2. [2]
   Normandy landings

   Wikipedia (EN) · encyclopedia