This monograph examines General J. Lawton Collins' career and argues that his command style was characterized by technical and tactical competence, the practical ability to lead from the front and sound judgment. This monograph examines these key factors in three subsections. General Collins gained his technical and tactical competence by theoretical preparation as a student and instructor. He first demonstrated the ability to position himself at the critical point on the battlefield as the commander of the 25th Infantry Division during the Guadalcanal Campaign in January 1943. As the commander of the VII Corps during the Allies' Campaign in northwest Europe from 1944 to 1945, he refined this ability. Finally, he developed sound judgment while performing key postings both during the interwar period and during the Second World War. This monograph shows how General J. Lawton Collins' command style translated into action and made him such an effective combat leader.