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251,540 Pages

Organization of Japanese defensive units in OkinawaOrganization of Japanese forces in Dutch IndiesOrganization of Japanese forces in Southeast Asia
Organization of Japanese units in SingaporeOrganization of Kita and Minami FortressesOrganization of Military Museums of Canada
Organization of United States Air Force Units in the Gulf WarOrganization of the Air Service of the American Expeditionary ForceOrganization of the Armed Forces of the Russian Federation
Organization of the Communist Party of ChinaOrganization of the Imperial Japanese ArmyOrganization of the Imperial Japanese Navy Alaskan Strike Group
Organization of the Kwantung ArmyOrganization of the Luftwaffe (1933–45)Organization of the Third Reich
Organization of the U.S. Army Air Service in 1925Organization of the United States Coast GuardOrganization of the United States Marine Corps
Organizational Excellence AwardOrganizational structure of the United States Department of DefenseOrgetorix
Orglandes German war cemeteryOrhanOrhan of the Ottoman Empire
Orhan ÇelebiOrhei FortOri Orr
Oriani-class destroyerOribi CommandoOrient Shield exercise
Orient campaign medalOriental Crisis of 1840Oriental Institute in Sarajevo
Oriental Powder CompanyOriental Titan UAVOriflamme
Original six frigates of the United States NavyOrigins of the American Civil WarOrigins of the Cold War
Origins of the Royal Canadian NavyOrigins of the War of 1812Orillon Batteries
Orin D. HaugenOrin G. MurfinOrindatus Simon Bolivar Wall
Orion-class battleshipOrion-class submarineOrion (satellite)
Orion P. HoweOrione-class torpedo boatOriskany Battlefield State Historic Site
Orit AdatoOrita M1941Orița M1941
Orjen-class torpedo boatOrkan-class fast attack craftOrkney Commando
Orkney Fortress Royal EngineersOrkney Wireless MuseumOrkneyinga saga
Orland K. ArmstrongOrland SmithOrland Steen Loomis
Orlando-class cruiserOrlando B. WillcoxOrlando Boss
Orlando Bridgeman, 5th Earl of BradfordOrlando Bridgeman (RAF officer)Orlando Burrell
Orlando DiGirolamoOrlando E. CaruanaOrlando Executive Airport
Orlando Fighter WingOrlando Henderson PettyOrlando Llenza
Orlando LorenziniOrlando Metcalfe PoeOrlando Norie
Orlando Ramón AgostiOrlando ReevesOrlando Ward
Orlando d'AragonaOrleansville AirfieldOrlik Aerobatic Team
Orlov RevoltOrlov revoltOrlovka
Orlovka (air base)Orly Air BaseOrly Airport attack
Orléans – Bricy Air BaseOrlík CastleOrmacleit Castle
Orme G. StuartOrmen Lange (longship)Ormer Locklear
Ormond CastleOrmond R. SimpsonOrmonde Winter
Ormsby-class attack transportOrmsby B. ThomasOrmsby M. Mitchel
Orna BarbivaiOro Bay AirfieldOrobius
Oromo-Somali clashesOromo Liberation FrontOromo conflict
Oromo–Somali clashesOron CastleOrongokoekoea Pā
Orontes River offensiveOropesaOropesa (minesweeping)
Orote FieldOrozimbo BarbosaOrphan Brigade
Orpheus S. WoodwardOrren BennettOrren R. Whiddon
Orrin KeepnewsOrrin L. MannOrris E. Kelly
Orris S. FerryOrsa-class torpedo boatOrscholz Switch
Orsha offensives (1943)Orsini-Colonna CastleOrsis T-5000
Orsk AirportOrson Leon CrandallOrson Swindle
Orson W. BennettOrtenstein CastleOrtgies Semi-Automatic Pistol
Ortnek CastleOrtwin GamberOrtwin Kuske
Ortún Velázquez de VelascoOruzgan police station attack of January 2002Oruç Reis
Oruç Reis-class submarineOrval FaubusOrval R. Cook
Orvan HessOrvil A. AndersonOrville Alfred Ralston
Orville BullingtonOrville C. PrattOrville E. Babcock
Orville Emil BlochOrville FreemanOrville Moody
Orville NaveOrville T. ChamberlainOrvin B. Fjare
Oryoku MaruOryol FrontOryol Prison
Oryol Yuzhny AirportOrzeł-class submarineOrzeł incident
Orénoque (1781)Orénoque (1781 ship)Oršić Castle in Gornja Stubica
Osa-class missile boatOsa (handgun)Osage Mission's post
Osaka ArsenalOsaka CastleOsaka Guard District
Osama El-GendiOsama bin LadenOsami Nagano
Osamu KudōOsan Air BaseOsbat al-Ansar
Osbat al-NourOsbern PentecostOsbert Peake, 1st Viscount Ingleby
Osbert SitwellOsborn BarracksOsborn Deignan
Osborne B. WisemanOsborne CowlesOsborne House
Osborne OrrOsborne Perry AndersonOsbyholm Castle
Oscar-class submarineOscar BrittOscar Broady
Oscar BrookinOscar BurkardOscar C. Badger
Oscar C. Badger IIOscar C. PackerOscar C. Parkinson
Oscar CarrilloOscar Colin MorisonOscar Cristi
Oscar E. CarlstromOscar E. PeckOscar F. Miller
Oscar F. MooreOscar F. PeatrossOscar F. Perdomo
Oscar Fitzalan LongOscar Frederick NelsonOscar G. Johnson
Oscar Griffin, Jr.Oscar GriswoldOscar H. Dodson
Oscar HagbergOscar HeronOscar Hilman
Oscar Hirsh DavisOscar Hugh La GrangeOscar J. Upham
Oscar J. ZunigaOscar KochOscar L. Shepard
Oscar LaphamOscar Lawrence JacksonOscar Lawton Wilkerson
Oscar LinksonOscar López RiveraOscar M. Laurel
Oscar MalmborgOscar MarionOscar Michiels
Oscar Montgomery LieberOscar MonthanOscar Murton, Baron Murton of Lindisfarne
Oscar NygrenOscar O'Neill Oxholm (1809–1871)Oscar P. Austin
Oscar P. SnyderOscar R. Cauldwell
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