War of the Worlds is based on a novel.
War is an intense armed conflict between states, governments, societies, or paramilitary groups such as mercenaries, insurgents, and militias
=== Largest by death toll ===The deadliest war in history, in terms of the cumulative number of deaths since its start, is World War II, from 1939 to 1945, with 7085 million deaths, followed by the Mongol conquests at up to 60 million

