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55 S 5555th/53rd Battalion (Australia)55th (Kent) Heavy Anti-Aircraft Regiment, Royal Artillery
55th (New Brunswick & Prince Edward Island) Battalion, CEF55th (West Lancashire) Infantry Division55th (Westmorland) Regiment of Foot
55th Air Defense Artillery Regiment55th Air Defense Artillery Regiment (United States)55th Air Refueling Squadron
55th Airborne Brigade55th Airlift Flight55th Army (Soviet Union)
55th Artillery Brigade (Ukraine)55th Battalion (Australia)55th Battalion (New Brunswick & Prince Edward Island), CEF
55th Brigade55th Brigade Combat Team, 28th Infantry Division (United States)55th Coke's Rifles (Frontier Force)
55th Composite Aviation Division55th Corps (German Empire)55th Division
55th Division (Imperial Japanese Army)55th Electronic Combat Group55th Fighter Squadron
55th Fighter Wing55th Guards Rifle Division55th Heavy Brigade Combat Team
55th Heavy Brigade Combat Team (United States)55th Illinois Infantry Regiment55th Illinois Volunteer Infantry Regiment
55th Indian Brigade55th Indian Infantry Brigade55th Indiana Infantry Regiment
55th Infantry Brigade (United Kingdom)55th Infantry Division (France)55th Infantry Division (Poland)
55th Infantry Division (Russian Empire)55th Infantry Division (United States)55th Infantry Division Savona
55th Infantry Regiment (United States)55th Maneuver Enhancement Brigade55th Maneuver Enhancement Brigade (United States)
55th Massachusetts Infantry Regiment55th Medical Group (United States)55th Mixed Aviation Division
55th Mobile Command and Control Squadron55th Motorized Infantry Brigade (People's Republic of China)55th Naval Infantry Division
55th New York Volunteer Infantry55th Ohio Infantry55th Operations Group
55th Paratroopers Brigade55th Pennsylvania Infantry55th Pennsylvania Infantry Regiment
55th Regiment Kentucky Volunteer Mounted Infantry55th Regiment of Foot (disambiguation)55th Rescue Squadron
55th Rifle Division (Soviet Union)55th Space Weather Squadron55th Special Operations Squadron
55th Support Battalion55th Sustainment Brigade (United States)55th Tennessee Infantry Regiment
55th United States Colored Infantry Regiment55th Virginia Infantry55th Weather Reconnaissance Squadron
55th Wing560th Battlefield Surveillance Brigade (United States)560th Fighter-Day Squadron
560th Flying Training Squadron560th Volksgrenadier Division (Wehrmacht)561st Fighter-Day Squadron
561st Fighter Squadron561st Joint Tactics Squadron561st Volksgrenadier Division (Wehrmacht)
562 Parachute Squadron Royal Corps of Transport (Volunteers)562d Flying Training Squadron562nd Air Defense Artillery Regiment
562nd Grenadier Division (Wehrmacht)563d Flying Training Squadron563d Rescue Group
563rd Volksgrenadier Division (Wehrmacht)564th Air Defense Group564th Missile Squadron
564th Volksgrenadier Division (Wehrmacht)565th Strategic Missile Squadron566th Air Defense Group
566th Intelligence Squadron566th Strategic Missile Squadron567th Air Defense Group
567th Strategic Missile Squadron568th Air Defense Group568th Strategic Missile Squadron
569th Strategic Missile Squadron56 (Olpherts) Battery Royal Artillery56 Division (Sri Lanka)
56 Squadron56th (Cornwall) Heavy Anti-Aircraft Regiment, Royal Artillery56th (King's Own) Anti-Tank Regiment, Royal Artillery
56th (London) Division56th (London) Infantry Division56th (West Essex) Regiment of Foot
56th Air Defense Artillery Regiment56th Air Defense Artillery Regiment (United States)56th Air Refueling Squadron
56th Airlift Squadron56th Army (Soviet Union)56th Battalion (Australia)
56th Battalion (Calgary), CEF56th Brigade56th Brigade Combat Team, 28th Infantry Division (United States)
56th Cavalry Brigade (United States)56th Division56th Division (Imperial Japanese Army)
56th Field Artillery Command56th Field Artillery Regiment, RCA56th Fighter-Interceptor Squadron
56th Fighter Wing56th Group56th Guards Air Assault Brigade
56th Guards District Training Center56th Illinois Infantry Regiment56th Illinois Volunteer Infantry Regiment
56th Independent Mixed Brigade56th Indian Brigade56th Indiana Infantry Regiment
56th Infantry Brigade (United Kingdom)56th Infantry Brigade Combat Team (United States)56th Infantry Division (German Empire)
56th Infantry Division (Russian Empire)56th Infantry Division (Wehrmacht)56th Infantry Division Casale
56th Infantry Regiment (United States)56th Motorized Brigade (Ukraine)56th Motorized Infantry Brigade (People's Republic of China)
56th New York Volunteer Infantry56th North Carolina Infantry56th Ohio Infantry
56th Operations Group56th Pennsylvania Infantry56th Pennsylvania Infantry Regiment
56th Punjabi Rifles (Frontier Force)56th Regiment56th Regiment United States Colored Infantry
56th Regiment of Foot (disambiguation)56th Rescue Squadron56th Reserve Infantry Battalion (Ireland)
56th Rifle Division56th Rifle Division (Soviet Union)56th Stryker Brigade Combat Team
56th Training Squadron56th United States Colored Infantry56th Virginia Infantry
570th Anti-Submarine Aviation Squadron570th Strategic Missile Squadron571st Anti-Submarine Aviation Squadron
571st Strategic Missile Squadron572d Bombardment Squadron573d Bombardment Squadron
574th Bombardment Squadron574th Volksgrenadier Division (Wehrmacht)575th Air Defense Group
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