Peel was elected major of the Third Regiment, Arkansas Infantry, and later colonel of the Fourth Regiment, Arkansas Infantry. He studied law. He was admitted to the bar and commenced the practice of his profession in Carrollton, Arkansas, in 1865. He moved to Bentonville, Benton County, in 1867 and continued the practice of law. He served as prosecuting attorney of the fourth judicial circuit of Arkansas 1873-1876.