Civil War Congressional Medal of Honor Recipient. He served in the Union Navy during the Civil War as a First Class Fireman on board the "USS Richmond". He was awarded the CMOH for his bravery in the attack on Port Hudson on March 14, 1863. His citation reads "Damaged by a 6-inch solid rifle shot which shattered the starboard safety-valve chamber and also damaged the port safety valve, the fireroom of the Richmond immediately became filled with steam to place it in an extremely critical condition. Acting courageously in this crisis, Rush persisted in penetrating the steam-filled room in order to haul the hot fires of the furnaces, and continued this action until the gravity of the situation had been lessened". His Medal was awarded to him on July 10, 1863.