The Second World War is known as the most destructive war in history because it took huge tolls of life, destroyed houses, communication lines and industries.
The Pearl Harbour incident of 1941 caused the death and injury of 3700 men.
The dropping of atomic bomb on Hiroshima around 84000 people. The simil;ar event in Nagasaki killed another 40000. The radiation poisoning caused due to these incidents also caused the death of many more.
The Holocaust caused the extermination of 5 million Jews. In Poland and Russia, the atrocities of Hitler also caused the death of another hundreds of thousands non-Jews.
The war left around 21 million homeless.
The industries and the cities of Germany were worst hit.