Defence Forces
- Aerospace Defense Command
- Air defence forces
- Ambazonia Defence Forces
- American and British English spelling differences
- Antigua and Barbuda Defence Force
- Artsakh Defence Army
- Australian Defence Force
- Bahrain Defence Force
- Bantustan
- Barbados Defence Force
- Barbados Defence Force SC
- Belize Defence Force
- Belize Defence Force FC
- Bophuthatswana Defence Force
- Botswana Defence Force
- Botswana Defence Force XI
- British Ceylon
- British Solomon Islands Protectorate Defence Force
- Bundeswehr
- Burundi National Defence Force
- Central Air Defense Force
- Ceylon Defence Force
- Chief of the Defence Force (disambiguation)
- Chin National Defence Force
- Chinland Defense Force
- Ciskei Defence Force
- Citizens' Defence Force
- Croatian Defence Forces
- Cuban Air and Air Defense Force
- Danish Defence
- Defence Force F.C.
- Defence Force of Haiti
- Defense Forces of Georgia
- Dominica Defense Force
- Eastern Air Defense Force
- Egyptian Air Defense Forces
- Eritrean Defence Forces
- Estonian Defence Forces
- Ethiopian National Defense Force
- Falkland Islands Defence Force
- Fatherland Defense Force
- Finnish Defence Forces
- Guyana Defence Force
- Guyana Defence Force FC
- Hungarian Defence Force
- Iceland Defense Force
- Indian Defence Force
- Irish Defence Forces
- Islamic Republic of Iran Air Defense Force
- Israel Defense Forces
- Jamaica Defence Force
- Japan Air Self-Defense Force
- Japan Self-Defense Forces
- Karenni Nationalities Defence Force
- Kazakh Air Defense Forces
- Kenya Defence Forces
- Lesotho Defence Force
- Lesotho Defence Force FC
- Lithuanian National Defence Volunteer Forces
- Lithuanian Territorial Defense Force
- Lofa Defense Force
- Malawian Defence Force
- Maldives National Defence Force
- Military of Swaziland
- Mozambique Defence Armed Forces
- Myanmar Civil War
- Namibia Defence Force
- National Defence Forces (Syria)
- New Zealand Defence Force
- Norwegian Cyber Defence Force
- Pakistan Army Air Defence Corps
- Panama Defense Forces
- Papua New Guinea Defence Force
- People's Defence Force (Myanmar)
- People's Liberation Army Navy Coastal Defense Force
- People's Self-Defense Force
- Polish Air Defence Force
- Popular Defence Forces (Sudan)
- Royal Bahamas Defence Force
- Royal Hong Kong Defence Force
- Royal Montserrat Defence Force
- Royal Saudi Air Defense Forces
- Russian Aerospace Defence Forces
- Rwandan Defence Forces
- Saint Kitts and Nevis Defence Force
- Self-Defense Forces (DFNS regions)
- Serbian Air Force and Air Defence
- Seychelles People's Defence Force
- Singapore Civil Defence Force
- Slovenian Air Force and Air Defence
- South African Defence Force
- South African National Defence Force
- South Sudan Defence Forces (militia)
- South Sudan People's Defense Forces
- Southern Cameroons Defence Forces
- Soviet Air Defence Forces
- State defense force
- Sudan Defence Force
- Syrian Air Defense Force
- Tanzania People's Defence Force
- Territorial Air Defence Forces
- Territorial Defence Force (Poland)
- Territorial Defence Force of the Republic of Bosnia and Herzegovina
- Territorial Defense Forces (Ukraine)
- Territorial Defense Forces (Yugoslavia)
- Tigray Defense Forces
- Timor Leste Defence Force
- Transkei Defence Force
- Trinidad and Tobago Defence Force
- Uganda People's Defence Force
- Ukrainian Air Defence Forces
- Union Defence Force (South Africa)
- United Self-Defense Forces of Colombia
- United States Air Force
- Uzbekistan Air and Air Defence Forces
- Venda Defence Force
- Wehrmacht
- Western Air Defense Force
- Zambian Defence Force
- Zanzibar Volunteer Defence Force
- Zimbabwe Defence Forces