[Includes 51 maps and 71 illustrations] This volume deals with the campaign waged by the Third Army in Lorraine during the period 1 September-18 December 1944. The present volume is concerned with the tactical operations of the Third Army and its subordinate units. The story of command and decision in higher headquarters is told only when it has a direct bearing on the campaign in Lorraine. The logistics of this campaign likewise have been subordinated to the tactical narrative. The basic unit in the present narrative is the infantry or armored division. The story of the division has been told in terms of its regiments and battalions, but swerves on occasion to the company or the platoon, just as the operations themselves turned on the exploits of these smaller units. Attention has been focused throughout the volume on the combat formations actually in the line. It is hoped, however, that the reader will gain some impression of the vital combination of arms and services which in the long run bring the infantry and the tanks to victory.