Striking at 5:30 a.m. on Saturday, 16 December, the Germans achieved almost total surprise in breaking through the allied lines, beginning what is commonly called the Battle of the Bulge. The Germans launched their great attack of 1940 through the same region, with Generalfeldmarschall Gerd von Rundstedt in command then as he was once again in this campaign. His goal was to separate the American forces from the British and Canadian forces, and take the important port city of Antwerp. By late afternoon the Germans had 14 divisions operating in the Ardennes, but this number would swell to an estimated 25 divisions, with 600 tanks and 1,000 aircraft. The 106th Division, located in the most exposed positions along the corps line, and the 28th Division took the brunt of the attack. Middleton, headquartered in Bastogne, was awakened by a guard and could hear the guns from there. Throughout the day, the 106th was able to hold its position, but additional German units poured in during the night. Much of the 106th was on the German side of the Our River in an area known as the Schnee Eifel. The division's commander, Major General Alan Jones, called Middleton, concerned about his two regiments east of the river. The conversation was interrupted by another call, and then resumed. At the end of the conversation Middleton told an aide that he had given his approval to have the two regiments pull back to the west side of the river. Jones, on the other hand was convinced that Middleton had directed these units to stay, and was further convinced of this based on a written order from earlier in the day, but just received. As a result of the miscommunication, the pullback did not occur, and the two regiments were ultimately surrounded with most of the men captured on 17 December. While two of the 28th Division's regiments survived the German onslaught intact, the 110th Infantry Regiment, commanded by Colonel Hurley Fuller, was directly in the path of the massive advance. On 17 December Fuller counterattacked, but his lone regiment was up against three German divisions, and when Fuller's command post was attacked his escape was thwarted and he was taken prisoner. Middleton next heard from him in April when he was released. Though the 110th Regiment was shattered, the stubborn resistance given by them and other VIII Corps units greatly slowed down the German timetable.