By a long, long way it's WW2.
World war Two, Russian had over 10million casualties.
Civil War
People get shot,sniped and,bombed! That's how most of the casualties are caused in the war
The Union.
Death
who had th most battle casualties during the second world war, us.infantry
Russia
No, WWII remains the deadliest war.
The USSR (Russia).
Since a cold war means NO WAR, there were no casualties.
The duration of Casualties of War is 1.88 hours.
Well, the campaign with the most casualties was Operation Barbarossa, which was the German invasion of Russia. The battle with the most casualties was the Battle of Moscow