United States > Military Affairs > American Wars

Casualties in World War I

This page provides information about the number of troops in World War I, including how many were killed, wounded, or taken prisoner. The data is divided by each nation that participated in the war.

Country	Total mobilized forces	Killed or died¹	Wounded	Prisoners or missing	Total casualties
Austria-Hungary	7,800,000	1,200,000	3,620,000	2,200,000	7,020,000
Belgium	267,000	13,716	44,686	34,659	93,061
British Empire²	8,904,467	908,371	2,090,212	191,652	3,190,235
Bulgaria	1,200,000	87,500	152,390	27,029	266,919
France²	8,410,000	1,357,800	4,266,000	537,000	6,160,800
Germany	11,000,000	1,773,700	4,216,058	1,152,800	7,142,558
Greece	230,000	5,000	21,000	1,000	27,000
Italy	5,615,000	650,000	947,000	600,000	2,197,000
Japan	800,000	300	907	3	1,210
Montenegro	50,000	3,000	10,000	7,000	20,000
Portugal	100,000	7,222	13,751	12,318	33,291
Romania	750,000	335,706	120,000	80,000	535,706
Russia	12,000,000	1,700,000	4,950,000	2,500,000	9,150,000
Serbia	707,343	45,000	133,148	152,958	331,106
Turkey	2,850,000	325,000	400,000	250,000	975,000
United States	4,734,991	116,516	204,002	—	320,518