As it was with the Hatfields and the McCoys; the Capulets and the Montague: it all started when one of their girls fell in love with one of their boys. In the case of the vampires and werewoves, it was a vampire girl - werewolf boy. People (and things) just don't like their children to mix.
The United States most recently. The first of the ten crusades was started by order of the Pope.
Arthur won the war.
The crusades were wars. they were between the Christan's and the Muslims. they were mostly over land the Muslims had taken over. It all started when the Muslims took over Jerusalem. The pope called for war to take it back and that is what he got.
Korean War
Punic Wars?
In the very earliest stages of the myths vampires, werewolves, and ghouls are all pretty much the same thing. It is only later that distinctions are made. The vampire/werewolf hybrid however is a very recent innovation.
war between the states started over states rights
It depends on which ones you are talking about.
The Persians
underworld...tis an awesome film
the Cases of Chinese Civil war started because Struggle for power between Nationalists and Communists broke out into war.
world war two almost started in 1913, there was the agricultural revolution, the american civil war ended and started
A dispute over Sicily.
It Started,The War Between The States.
Peloponnesian War 431-404 BCE.
War of 1812. It was fought between the British and the United States; It lasted a year.
The First World War ended in 1918, World War 2 started in 1939, so there was 21 years between them.