Throughout history there have been too many wars to list here--wars rage on to this very day.
They all lived happily ever after
The same reason all wars happen: Greed of The Chaldean thieves. === ===
Space Wars happened in 1977.
Yavapai Wars happened in 1861.
Because WWI was considered to be "the war to end all wars." Unfortunately that's not happened
The Persian Wars lasted from 499-448 BC. The Pelopenesian Wars lasted from 431-404 BC So the answer is: The Persian Wars happened first.
Beaver Wars happened in 16##.
Arena Wars happened in 2004.
Kandyan Wars happened in 1796.
Base Wars happened in 1991.
Trade Wars happened in 1984.
Neon Wars happened in 2006.