 ogun agbaye akọkọ : Ogun Àgbáyé Kìíní jẹ ìjà àgbáyé tí ó jà láàárín àwọn àjọṣepọ méjì, Allied Powers àti Central Powers, láti ọjọ 28 oṣù Keje ọdún 1914 sí ọjọ 11 oṣù kọkànlá ọdún 1918. Ogun náà jà ní Europe, Àárín Ìlà Oòrùn, Áfíríkà, Pacific, àti àwọn apá kan Asia. Ìjà náà yọrí sí ìṣubú àwọn ìjọba ìjọba ńlá mẹrin ó sì gbé ìpìlẹ kalẹ fún Ogun Àgbáyé Kejì.Awọn àjọṣepọ alagbara ni France, United Kingdom ati awọn agbegbe rẹ, Canada, Australia, India, Ceylon, New Zealand, Newfoundland, South Africa, Russia, Serbia, Belgium, Japan, Montenegro, Luxembourg, Italy lati 1915, Romania lati 1915. 1916, Portugal lati 1916, Hejaz lati 1916, United States lati 1917, Greece lati 1917, Siam lati 1917, China lati 1917, Brazil lati 1917, Brazil lati 1917, Czechoslovakia lati 1918. , Armenia lati 1918, ati awọn miiran Awọn Alagbara Aarin ni Germany, Austria-Hungary, Ottoman Empire, Sultanate ti Darfur titi di 1916, Bulgaria lati 1915, Jabal Shammar lati 1915, ati awọn miiran.Powers ni France, United Kingdom ati awọn agbegbe rẹ, Canada, Australia, India, Ceylon, New Zealand, Newfoundland, South Africa, Russia, Serbia, Belgium, Japan, Montenegro, Luxembourg, Italy lati 1915, Romania lati 1915. 1916, Portugal lati 1916, Hejaz lati 1916, United States lati 1917, Greece lati 1917, Siam lati 1917, China lati 1917, Brazil lati 1917, Brazil lati 1917, Czechoslovakia lati 1918. , Armenia lati 1918, ati awọn miiran Awọn Alagbara Aarin ni Germany, Austria-Hungary, Ottoman Empire, Sultanate ti Darfur titi di 1916, Bulgaria lati 1915, Jabal Shammar lati 1915, ati awọn miiran. , Greece lati 1917, Siam lati 1917, China lati 1917, Brazil lati 1917, Czechoslovakia lati 1918, Armenia lati 1918, ati awọn miiran Awọn Agbara Central ni Germany, Austria-Hungary, Ottoman Empire, Sultanate of Darfur titi di 1916, Bulgaria lati 1915, Jabal Shammar lati 1915, ati awọn omiiran. Àpapọ iye ikú àwọn ológun àti àwọn aráàlú nínú Ogun Àgbáyé Kìíní ni wọn rò pé ó lé ní mílíọnù mẹsàn-án. Ogun náà yọrí sí ìdásílẹ àwọn orílẹ-èdè tuntun ní Europe àti Àárín Ìlà Oòrùn bíi Yugoslavia, Weimar Germany, Soviet Union, Lithuania, Estonia, Latvia, Austria, Hungary, Czechoslovakia, Turkey, Hejaz àti Yemen. Ó tún yọrí sí gbígbé àwọn ìlú àti agbègbè German lọ sí àwọn orílẹ-èdè mìíràn àti ìpín Ottoman Empire. 