Norman conquest of England was an invasion by the Duchy of Normandyball against the Anglo-Saxon ruled Kingdom of Englandball after the king of England, Harold Godwinson, refused to give up the throne to the heir of the last king, William the Conqueror.
England in the Middle Ages
The sun is shining, birds are singing, the children are playing in the village square, what a wonderful time to be alive! Wait really? People are dying from of dysentary, and also being raided by vikings, what an awful time to be alive!
It's the year 900. Europe is a vikings wet dream, raids galore. One day, Norwayball decided to raid West Franciaball's capital, Parisball. That particular raid didn't go to well, but France saw how tough and scary Norway was, and decided to let him stay and have part of her clay in the north, and in return he would protect her from other vikings. It was agreed, and soon Normandyball was born.
English viking problems.
Englandball also had his fair share of viking problems. In the 800s, Denmarkball had conquered most of the country, but England eventually managed to kick him out, although he left behind a bunch of viking settlers.