On board the USS Richmond during action against rebel forts and gunboats and with the ram Tennessee in Mobile Bay, 5 August 1864. Although knocked down and seriously wounded in the head, Doolen refused to leave his station as shot and shell passed. Calm and courageous, he rendered gallant service throughout the prolonged battle which resulted in the surrender of the rebel ram Tennessee and in the successful attacks carried out on Fort Morgan despite the enemy’s heavy return fire.