Answer:
World War II was the deadliest military conflict in history in terms of total dead, with some 75 million people casualties including military and civilians, or around 3% of the world's population at the time. Many civilians died because of deliberate genocide, massacres, mass-bombings, disease, and starvation.
Other effects:
-Effects of war also include mass destruction of cities and have long lasting effects on a country's economy. Armed conflict has important indirect negative consequences on infrastructure, public health provision, and social order. These indirect consequences are often overlooked and unappreciated.
-Putting aside the very real human cost, war has also serious economic costs – loss of buildings, infrastructure, a decline in the working population, uncertainty, rise in debt and disruption to normal economic activity.
