"For exceptionally meritorious and distinguished services to the Government of the United States, in a duty of great responsibility as Acting Assistant Commandant, Command and General Staff School, from August 1944 to September 1945. Under his far-sighted and inspiring leadership, accurate instruction was given to more than 6,000 potential general staff officers by the augmented facility he organized and trained, imparting up-to-date information essential for the efficient performance of combat, operational and administrative staffs. His supervision of the training given numerous officers of our Latin American allies at the School helped in important measure to further hemispheric solidarity. In addition, he planned and supervised the courses presented to Army-Navy Staff College classes and Philippine Army classes. Responsible for the effectiveness of all instruction given at the School, he performed his duties with outstanding devotion and with the aim of improving educational techniques and standards. The singularly distinctive accomplishments of General Campbell reflect the highest credit upon himself and the United States Army"
War Department, General Orders No. 1