The War of 1812 was a war.
=== 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
 As concerns a belligerent's losses in proportion to its prewar population, the most destructive war in modern history may have been the Paraguayan War (see Paraguayan War casualties)

