1) War of Roses was a series of civil wars in which two royal houses fought for the control of England. The house of Lancaster defeated the House of York.
2) French and Indian War-- The North American portion of this war, fought between Britain and France. It was a victory for the British caused a set stage for the American Revolutionary War a few years later.
3) Russian Civil War--Britain along with the United States. France and Japan intervened unsuccessfully in the civil war in Russia that brought the communists to power.