Adrian Tolen was commissioned through the Reserve Officer Training Corps program in 1936 upon graduation from the University of Nebraska. He graduated from the Adjutant General’s School in 1942, and left active duty in 1946 to earn his law degree. In 1947 he received a Regular Commission in the Judge Advocate General’s Department and transferred to the U.S. Air Force. He retired in 1969 as a U.S. Air Force Brigadier General.