Is the World War II really the largest war in history?

Proportionally yes. WWII involved 100 mil people deployed some way or the other, and roughly 50-60 mil of them were troops, or about one soldier out of every 44 people, the highest in recorded history. read more

It really depends how you define "largest" war in history. If you define it as largest death toll, then it is WWII, if you define it by the total length of the war then the Spanish Reconquista is the longest war in history. read more

It was previously called the Great War from its occurrence until the start of the mother of all blood baths in history, World War II. It involved all the great powers in the world, assembled in two opposing alliances the Allies and the Central Powers. read more

World War II was the deadliest conflict in human history, marked by 50 to 85 million fatalities, most of which were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, premeditated death from starvation and disease and the only use of nuclear weapons in war. read more