Armoured cavalry elements of the United States XX Corps, while on a reconnaissance operation in the direction of the Moselle, made contact with elements from the 17th SS Panzergrenadier Division on 6 September 1944.
Metz | Battle of Waterloo | Battle of Britain | Battle of the Somme | Battle of the Bulge | Battle of Gettysburg | Battle Creek, Michigan | Battle of France | Battle of Trafalgar | Battle of Hastings | Battle of Antietam | battle | Battle of Shiloh | Battle of Midway | Battle of Belleau Wood | Battle of the Alamo | Battle of Leipzig | Battle of Agincourt | Battle of Verdun | Battle of Thermopylae | Battle of the Plains of Abraham | Battle of Vienna | Second Battle of the Marne | Second Battle of El Alamein | Battle of the Nile | Battle of the Boyne | Battle of Stalingrad | Battle of Austerlitz | The Last Battle | Kathleen Battle |
During the liberation of Metz by American troops of the 3rd US-Army in the night of November 19, 1944 Dunckern was taken prisoner.
During the war, he was defeated by American forces under General George S. Patton at the Battle of Metz.