Previous page (Nègrepelisse massacre) | Next page (Office of the Joint Chiefs of Staff Identification Badge)
- Obice da 305/17
- Obice da 75/18 modello 34
- Obilić Medal
- Obizzo da Polenta
- Object 100
- Object 140
- Object 187
- Object 279
- Object 292
- Object 416
- Object 478
- Object 490
- Object 490A
- Object 770
- Object 775
- Object 785
- Object 907
- Objective Individual Combat Weapon
- Oblique order
- Oboe (navigation)
- Oboi
- Obor-kapetan
- Oboronprom
- Obrana národa
- Obregón pistol
- Obrona potoczna
- Observation Balloon Service in World War I
- Observation Post Alpha
- Observation Post Bari Alai
- Observation Post Fritsche
- Observation Post of the Serbian Army High Command on Kajmakčalan
- Observation balloon
- Observation post
- Observatory Ridge, Johannesburg
- Observer Badge
- Observer Badge (Luftwaffe)
- Observer Group
- Observer officer
- Obsidius
- Obsolete badges of the United States military
- Obsolete military awards of the United States
- Obstacle course
- Obstacles to troop movement
- Obturation
- Obu Toramasa
- Obua Ajukwu
- Obukhov State Plant
- Obukhovskii 12-inch/52-caliber Pattern 1907 gun
- Obusier de 105 modèle 1950
- Obusier de 120 mm C mle 1897 Schneider-Canet
- Obusier de 120 mm C modèle 1890
- Obusier de 120 mm mle 15TR
- Obusier de 155 mm C modèle 1881
- Obusier de 155 mm C modèle 1890
- Obusier de 155 mm Modèle 50
- Obusier de 15 cm TR Schneider-Canet-du-Bocage
- Obusier de 15 cm Valée
- Obusier de 200 "Pérou" sur affût-truck TAZ Schneider
- Obusier de 370 modèle 1915
- Obusier de 400 Modèle 1915/1916
- Obusier de 520 modèle 1916
- Obusier de 6 pouces Gribeauval
- Obusier de vaisseau
- Obyekt 279
- Obřany Castle
- Ocala (YTB-805)
- Ocala Rifles
- Occhiali
- Occupation Of Senaki
- Occupation of Araucanía
- Occupation of Balkh (1447)
- Occupation of Belarus by Nazi Germany
- Occupation of Constantinople
- Occupation of Coxim
- Occupation of Cullaville
- Occupation of Czechoslovakia (1938–1945)
- Occupation of Estonia by the German Empire
- Occupation of German Samoa
- Occupation of Gori
- Occupation of Hungary by Nazi Germany
- Occupation of Iceland
- Occupation of Iraq (2003–2011)
- Occupation of Istanbul
- Occupation of Japan
- Occupation of Kharkiv (1917)
- Occupation of Latvia by Nazi Germany
- Occupation of Liberec
- Occupation of Lima
- Occupation of Lithuania by Nazi Germany
- Occupation of Mecca
- Occupation of Mongolia
- Occupation of Ningbo
- Occupation of Poland (1939–1945)
- Occupation of Poland (disambiguation)
- Occupation of Poltava by the Bolsheviks (1918–1919)
- Occupation of Poti
- Occupation of Smyrna
- Occupation of Tangier (1940–1945)
- Occupation of Western Armenia
- Occupation of al-Ahwaz (870)
- Occupation of al-Ubulla (870)
- Occupation of the Baltic states
- Occupation of the Baltic states by Nazi Germany
- Occupation of the Channel Islands
- Occupation of the Dominican Republic
- Occupation of the Falkland Islands
- Occupation of the Gaza Strip by Egypt
- Occupation of the Gaza Strip by the United Arab Republic
- Occupation of the Jordan Valley
- Occupation of the Ottoman Bank
- Occupation of the Rhineland
- Occupation of the Ruhr
- Occupied Bosnia and Herzegovina
- Occupied Enemy Territory Administration (Ethiopia)
- Occupied territories of Georgia
- Occupied territories of Ukraine
- Ocea FPB 72
- Ocean View, Viet Nam
- Ocean View (Vietnam)
- Ocean boarding vessel
- Ocean escort
- Ocean ship
- Oceanxer unmanned vehicles
- Ocelot (vehicle)
- Ochiai Michihisa
- Ochil Kadyrov
- Ochomogo War
- Ochota Subdistrict (Home Army)
- Ochota massacre
- Ochotnicza Legia Kobiet
- Ocie Richie
- Ockenburg
- Ockie Anderson
- Oconee War
- Octav Onicescu
- Octave Lapize
- Octave Meynier
- Octavian Codru Tăslăuanu
- Octavius Catto
- Octavius Coke
- Octavius Mamilius
- Octavius Temple
- Octavius Vernon Harcourt
- Octavius Wigram
- October-class missile boat
- October 13 massacre
- October 1978 Getxo attack
- October 1995 Eastern Sri Lanka massacres
- October 2000 events
- October 2007 clashes in Hakkâri
- October 2009 Baghdad bombings
- October 2009 Lahore attacks
- October 2010 Abuja bombings
- October 2011 Baghdad bombings
- October 2012 Aleppo bombings
- October 2012 Beirut bombing
- October 2012 Jordanian–Syrian border clash
- October 2013 Volgograd bus bombing
- October 2014 Jerusalem vehicular attack
- October 2014 Sinai attacks
- October 2015 Aden missile attack
- October 2016 Idlib Governorate clashes
- October 2017 Mogadishu bombings
- October 2020 Afghanistan attacks
- October 2022 Beledweyne bombings
- October 22 Scud missile attack
- October 22nd Scud missile attack
- October 9 Revolution
- October Crisis
- October Offensive of the Central Lithuanian Army
- October Revolution
- October incident
- October–November 2021 Sudanese coup d'état
- Océan-class ironclad
- Océan-class ship of the line
- Oda Castle
- Oda Hidenobu
- Oda Hidetaka
- Oda Katsunaga
- Oda Nobuharu
- Oda Nobuhide
- Oda Nobuhiro
- Oda Nobukatsu
- Oda Nobunaga
- Oda Nobutada
- Oda Nobutaka
- Oda Nobutoki
- Oda Nobutoshi
- Oda Nobuyuki
- Oda clan
- Odaenathus
- Odai Yorisada
- Odani Castle
- Odartey Lamptey
- Odas Moon
- Odawara Castle
- Odd Bull
- Odd Fellows and Confederate Cemetery
- Odd Harsheim
- Odd Isaachsen Willoch
- Odd Karsten Tveit
- Odd Lindbäck-Larsen
- Odd Starheim
- Odd Werin
- Odd Øyen
- Odda, Ealdorman of Devon
- Odderøya
- Oddmund Hammerstad
- Oddusuddan offensive (1999)
- Ode: Sung on the Occasion of Decorating the Graves of the Confederate Dead at Magnolia Cemetery, Charleston, S.C., 1867
- Ode of Remembrance
- Oded Brigade
- Oded Fehr
- Odell Castle
- Odell House
- Odell K. Cassada
- Odell M. Conoley
- Odell Pollard
- Oden-class coastal defence ship
- Oden Bowie
- Odendaalsrus Commando
- Oderwerke
- Oder–Neisse line
- Odesa Military Academy
- Odesa Military District
- Odessa-Nikolaev March
- Odessa Bolshevik uprising
- Odessa Brigade
- Odessa Flight Strip
- Odessa Military Academy
- Odessa Military District
- Odessa Offensive Soviet order of battle
- Odessa Operation (1919)
- Odessa Operation (1920)
- Odet of Foix, Viscount of Lautrec
- Odette Hallowes
- Odie Spears
- Odiham Castle
- Odilo Globocnik
- Odilo Globočnik
- Odin-class coastal defense ship
- Odin-class submarine
- Odiorne Point State Park
- Odjak of Algiers
- Odlanier Mena
- Odo, Earl of Kent
- Odo Arpin of Bourges
- Odo I, Duke of Burgundy
- Odo II, Count of Blois
- Odo III, Duke of Burgundy
- Odo II of Champlitte
- Odo Löwe
- Odo Vivian, 3rd Baron Swansea
- Odo de St Amand
- Odo of Deuil
- Odo of Gascony
- Odo the Great
- Odoacer
- Odoardo Somigli
- Odoardo Toscani
- Odon Bacqué
- Odon Godart
- Odon Guitar
- Odon de Pins
- Odong Latek
- Odotheus
- Odowaa Yusuf Rageh
- Oduduwa Volunteer Force for the Liberation of Southern Nigeria
- Odus Creamer Horney
- Ody Abbott
- Odysseas Androutsos
- Odysseas Angelis
- Odzaberd
- Odziena Manor
- Oebares
- Oebares II
- Oeffag C.I
- Oeffag G
- Oenomaus (rebel slave)
- Oerip Soemohardjo
- Oerlikon 20 mm cannon
- Oerlikon 30 mm twin cannon
- Oerlikon 35 mm twin cannon
- Oerlikon FF
- Oerlikon GAI-BO1
- Oerlikon GDF
- Oerlikon KBA
- Oerlikon KCA
- Oerlikon Millennium 35 mm Naval Revolver Gun System
- Oerlikon SSG36
- Oeselians
- Ofek unit
- Ofeq
- Ofer Prison
- Ofer Shelah
- Off Tackle (war plan)
- Offa's Dyke
- Offa of Mercia
- Offenbach Archival Depot
- Offences against military law in the United Kingdom
- Offensive (military)
- Offensive Guard (Ukraine)
- Offensive counter air
- Offensive grenade wz. 24
- Offensive on Mariupol (September 2014)
- Offerman's Island
- Office for International Military Cooperation of the Central Military Commission
- Office for Reform and Organizational Structure
- Office for Strategic Planning of the Central Military Commission
- Office for the Administrative Review of the Detention of Enemy Combatants
- Office of Australian War Graves
- Office of Civil Defense
- Office of Civil Defense (Philippines)
- Office of Civilian Defense
- Office of Defense Cooperation Turkey
- Office of Defense Mobilization
- Office of Detainee Affairs
- Office of Economic Adjustment
- Office of Emergency Planning (Ireland)
- Office of Force Transformation
- Office of Inspectors General
- Office of Intelligence and Analysis (Treasury Department)
- Office of Legislative Affairs (United States Navy)
- Office of Military Government, United States
- Office of National Assessments
- Office of Naval Intelligence
- Office of Naval Material
- Office of Naval Research
- Office of Net Assessment
- Office of Production Management
- Office of Scientific Intelligence
- Office of Scientific Research and Development
- Office of Special Plans
- Office of Strategic Services
- Office of Technical Service
- Office of War Mobilization
- Office of the Administrative Assistant to the Secretary of the Army
- Office of the Chief, Army Reserve
- Office of the Chief Legislative Liaison (United States Army)
- Office of the Chief of Air Defence (Myanmar)
- Office of the Chief of Defence Staff
- Office of the Chief of Military Security Affairs
- Office of the Comptroller General of the Defence
- Office of the Inspector General, U.S. Department of Defense
- Office of the Inspector General of the United States Army