 The American entry into the war in 1917 saw more redeployment of 4.7-inch weapons.Eight Mark IV 40 caliber weapons from less-threatened forts were loaned to the Army Transport Service for the duration of hostilities and may have armed troop transports and cargo ships; they were returned in 1919 and promptly disposed of.Two Mark IV 40 caliber weapons were redeployed from Fort Strong in Boston Harbor to Sachuest Point in Middletown, Rhode Island.