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.
The prefix mono means 1. The suffix arch means rule. So in a monarchy there is 1 ruler—the king or queen
"Countryside" refers to all the territory outside major Roman settlements (cities, towns, villages, etc.) made up of land for agriculture, but also mostly uninhabited woods, prairies, valleys, mountain sides. etc.
I am not sure what exactly you want to receive as an answer but Ill give 2 examples.
After the rise of the Third Reich Jewish people were forced to migrate from Germany to neighboring countries and a lot of them in fact fled to United States including the famous scientist Albert Einstein.
The other example is the forced migration of Native Americans during the settlement and colonization by the American Colonies as they were trying to go farther down the continent.