Hitler arrived at Giessen on the Führersonderzug (train) on 11 December 1944, taking up residence at the castle until 16 January 1945.[1][better source needed] Von Rundstedt who was to command Operation Wacht am Rhein set up his headquarters near Limburg, close enough for the generals and Panzer Corps commanders who were to lead the attack to visit the castle that evening. Von Rundstedt ran through the plans, that at 05:00 on December 15, envisaged the attack of three German armies consisting of over 250,000 men.