Answer: Suffering and the death of others. It also brought new horrors to the world, which the world never new could come to.
Explanation: World War II was one of the transformative events of the 20th century, causing the death of 3 percent of the world's population. Deaths in Europe totaled 39 million people — half of them civilians. Six years of ground battles and bombing resulted in widespread destruction of homes and physical capital. World War I, which lasted from 1914 until 1918, introduced the world to the horrors of trench warfare and lethal new technologies such as poison gas and tanks. The result was some of the most horrific carnage the world had ever seen, with more than 16 million military personnel and civilians losing their lives.