First, 1st Battalion, 1st Marines, 1st Cavalry, 1st Reconnaissance Battalion, 1st Operations Group, 1st Regiment, 1st Mounted Division, 1st Fighter Brigade, 1st Senate district, 3rd Battalion, 1st Marines, 1st Division, Royal 1st Devon Yeomanry, 1st Rifle Division, 1st Armoured Infantry Brigade (United Kingdom), 1st Brigade Combat Team, 1st Cavalry Division (United States), 1st Pennsylvania Regiment, 1st Marine Expeditionary Brigade (United States), 1st Word, 1st Squadron, 1st Cavalry Regiment, 1st Reconnaissance Squadron, 1st Hussars, 2nd Battalion, 1st Marines, 1st Theater Sustainment Command, 1st Brigade, 1st Armored Division (United States), 1st Marine Regiment (United States), 1st Brigade Combat Team, 1st Infantry Division (United States), 1st Michigan Infantry Regiment, 1st Distribution Support Battalion, 1st Marine Division, 1st Maryland Cavalry Battalion, 1st & Ten, 1st Arkansas Infantry Regiment, 1945–46 Danish 1st Division, 1st Brigade Combat Team, 1951–52 Danish 1st Division, 1st Arkansas Cavalry Regiment, 1st Kentucky Infantry Regiment, 1955–56 Danish 1st Division, 1949–50 Danish 1st Division, 1946–47 Danish 1st Division

1948–49 Danish 1st Division, 1947–48 Danish 1st Division, 1st Artillery Regiment, 1st Kentucky Cavalry Regiment, 1st Missouri Infantry Regiment, 1952–53 Danish 1st Division, 1950–51 Danish 1st Division, 1st Engineer Regiment (Italy), 1st Airborne, 1954–55 Danish 1st Division, 1st Constitution Bancorp, 1953–54 Danish 1st Division, 1st Louisiana Infantry Regiment, 1st Air Defense Artillery Regiment, 1st Delaware Infantry Regiment, 1st Bombardment Wing, 1st Brigade (Australia), 1st Maryland Infantry Regiment, 1st Louisiana Cavalry Regiment, 1st Armoured Brigade (United Kingdom), 1st Airborne Command Control Squadron, 1st (UK) Division, 1st Battle Squadron, 1st Colorado Infantry Regiment, 1st Belorussian Front, 1st Division (Thailand), 1st ward, Chicago, 1st Combat Engineer Battalion, 1st Division (Australia), 1st Infantry Regiment (United States), 1st (African) Division, 1st Horse (Skinner's Horse), 1st Cavalry Division (United States), 1st Infantry Division (United States), 1st Armored, 1st Parachute Division (Germany), 1st Royal New South Wales Lancers, 1st Light Car Patrol (Australia), 1st Canadian Parliament, Ōita 1st district, 1st Medical Brigade, 1st Anti-Aircraft Brigade, 1st Expeditionary Rescue Group, Francis Cook, 1st Viscount of Monserrate, 1st Georgia Infantry Regiment, 1956–57 Danish 1st Division, 1st Armored Division (France), 1st Arkansas Consolidated Infantry Regiment, 1st Brahmans, 1st Infantry Division (France)

First, 1st Battalion, 1st Marines, 1st Cavalry, 1st Reconnaissance Battalion, 1st Operations Group, 1st Regiment, 1st Mounted Division, 1st Fighter Brigade, 1st Senate district, 3rd Battalion, 1st Marines, 1st Division, Royal 1st Devon Yeomanry, 1st Rifle Division, 1st Armoured Infantry Brigade (United Kingdom), 1st Brigade Combat Team, 1st Cavalry Division (United States), 1st Pennsylvania Regiment, 1st Marine Expeditionary Brigade (United States), 1st Word, 1st Squadron, 1st Cavalry Regiment, 1st Reconnaissance Squadron, 1st Hussars, 2nd Battalion, 1st Marines, 1st Theater Sustainment Command, 1st Brigade, 1st Armored Division (United States), 1st Marine Regiment (United States), 1st Brigade Combat Team, 1st Infantry Division (United States), 1st Michigan Infantry Regiment, 1st Distribution Support Battalion, 1st Marine Division, 1st Maryland Cavalry Battalion, 1st & Ten, 1st Arkansas Infantry Regiment, 1945–46 Danish 1st Division, 1st Brigade Combat Team, 1951–52 Danish 1st Division, 1st Arkansas Cavalry Regiment, 1st Kentucky Infantry Regiment, 1955–56 Danish 1st Division, 1949–50 Danish 1st Division, 1946–47 Danish 1st Division, 1948–49 Danish 1st Division, 1947–48 Danish 1st Division, 1st Artillery Regiment, 1st Kentucky Cavalry Regiment, 1st Missouri Infantry Regiment, 1952–53 Danish 1st Division, 1950–51 Danish 1st Division, 1st Engineer Regiment (Italy), 1st Airborne, 1954–55 Danish 1st Division, 1st Constitution Bancorp, 1953–54 Danish 1st Division, 1st Louisiana Infantry Regiment, 1st Air Defense Artillery Regiment, 1st Delaware Infantry Regiment, 1st Bombardment Wing, 1st Brigade (Australia), 1st Maryland Infantry Regiment, 1st Louisiana Cavalry Regiment, 1st Armoured Brigade (United Kingdom), 1st Airborne Command Control Squadron, 1st (UK) Division, 1st Battle Squadron, 1st Colorado Infantry Regiment, 1st Belorussian Front, 1st Division (Thailand), 1st ward, Chicago, 1st Combat Engineer Battalion, 1st Division (Australia), 1st Infantry Regiment (United States), 1st (African) Division, 1st Horse (Skinner's Horse), 1st Cavalry Division (United States), 1st Infantry Division (United States), 1st Armored, 1st Parachute Division (Germany), 1st Royal New South Wales Lancers, 1st Light Car Patrol (Australia), 1st Canadian Parliament, Ōita 1st district, 1st Medical Brigade, 1st Anti-Aircraft Brigade, 1st Expeditionary Rescue Group, Francis Cook, 1st Viscount of Monserrate, 1st Georgia Infantry Regiment, 1956–57 Danish 1st Division, 1st Armored Division (France), 1st Arkansas Consolidated Infantry Regiment, 1st Brahmans, 1st Infantry Division (France), 1st Test and Evaluation Squadron, 1st Cavalry Regiment (United States), Joseph Maclay, 1st Baron Maclay, 1st Source, 1st Fighter Wing, 1st Low Altitude Air Defense Battalion, 1st Fighter Squadron, 1st Earl of Suffolk, 1st Special Operations Squadron, 1st Pontieri Regiment, 1st Wisconsin Infantry Regiment, 1st (Peshawar) Division, 1st Foreign Regiment (France), 1st Provisional Marine Brigade, 1st Civil Affairs Group, 1st Air Cavalry Brigade, Captain 1st rank, 1959 Danish 1st Division, 1st Mobile Corps, 1st Marine Logistics Group, 1st Battalion, 5th Marines, 1st Airlanding Brigade (United Kingdom), 1st Earl Temple, 2003–04 Danish 1st Division, 2002–03 Danish 1st Division, 1996–97 Danish 1st Division, 1960 Danish 1st Division, 1st Force Reconnaissance Company, 1958 Danish 1st Division, 1st Canadian Division, 1st Health Battalion (Australia), 1997–98 Danish 1st Division, 1st Armoured Division (Australia), 1st Guards Brigade (Croatia), Komandarm 1st rank, 1st Minnesota Infantry Regiment, 1st Ski Division (Wehrmacht), 1st millennium BC, 2000–01 Danish 1st Division, 1st GAM: Amai Yuwaku, 1st Florida Cavalry Regiment, 1st Strategic Aerospace Division, 1st Army Corps, 1st Tank Brigade (Ukraine), 2001–02 Danish 1st Division, 1st Marine Aircraft Wing, 1st Time, 1st Brigade (New Zealand), 1995–96 Danish 1st Division, 1st Airlift Squadron, 1st Armored Brigade (People's Republic of China), 1st Commonwealth Division, 1998–99 Danish 1st Division, 1st Tactical Missile Squadron, 1999–2000 Danish 1st Division, 1st Alabama Cavalry Regiment, 1st Aviation Regiment (United States), 1st Helicopter Squadron, 1st Panzergrenadier Brigade (Germany), Active Privy Councillor, 1st class