High Quality Content by WIKIPEDIA articles! The Battle of Aachen was a battle in Aachen, Germany, which occurred between 2–21 October 1944. By September 1944, the Wehrmacht had been pushed into Germany proper, after being defeated in France by the Western Allies. During the campaigning in France, German commanders estimated that their total strength only amounted to that of 25 full strength divisions; at the time, the Wehrmacht operated 74 divisions in France. Despite these losses, the Germans were able to retreat to the Siegfried Line and partially rebuild their strength; they were able to bring the total number of combat personnel along the Western Front to roughly 230,000 troops. Although not necessarily well trained, nor well armed, these German defenders were substantially aided by the fortifications which composed the Siegfried Line. During the month of September the first fighting sprung up around Aachen and the city`s commander offered to surrender it to the advancing Americans. However, his letter of surrender was discovered by the SS during a raid in Aachen while the civilians were evacuating. Adolf Hitler ordered his immediate arrest and replaced him and his division with Gerhard Wilck`s 246th Volksgrenadier Division. The United States` First Army would have to take the city by force.