What are three factors that made World War I a total war?

(1914€“1918)
was a total war because of its casualties, geography, and weaponry.

The
first factor that made World War I a total war was the unprecedented number of combatants,
battle casualties, and overall human losses. The victorious Allies mobilized 42,000,000 men, and
more than 52% of those became casualties. Nearly 23,000,000 men fought for the Central Powers,
and nearly 58% of them were casualties. Conscription created huge armies, and the length and
intensity of the fighting led to unparalleled carnage. The war left millions of widows and
orphans. After the war finally ended...