Question

country total mobilized forces killed wounded prisoners and missing total casualties casualties as % of forces allies russia 12,000,000 1,700,000 4,950,000 2,500,000 9,150,000 76.3 british empire 8,904,467 908,371 2,090,212 191,652 3,190,235 35.8 france 8,904,467 908,371 2,090,212 191,652 3,190,235 35.8 italy 5,615,000 650,000 947,000 600,000 2,197,000 39.1 united states 4,355,000 116,516 204,002 4,500 323,018 7.1 which factor explains the high casualty rates of suffered by both sides in world war i? aerial attacks on civilian populations the use of poison gas and machine guns the use of unrestricted submarine warfare blimps used to direct artillery fire

Explanation:

In World War I, the use of poison gas and machine - guns led to high casualty rates. Poison gas caused severe injuries and deaths, and machine - guns provided rapid and continuous firepower, mowing down large numbers of soldiers in the trenches. Aerial attacks on civilians mainly affected non - combatants and not directly the military casualty rates. Unrestricted submarine warfare affected naval and merchant shipping and trade, not directly the land - based military casualty rates. Blimps used for artillery fire direction were not the main cause of high casualty rates.

Answer:

the use of poison gas and machine guns