Why did English change from old to middle English?

The event that began the transition from Old English to Middle English was the Norman Conquests of 1066.

Explanation:

Old English reflected the varied origins of the Anglo - Saxon kingdoms established in different part of Britain. The Anglian dialects had a greater influence on middle school. After the Norman conquest in 1066, Old English was replaced, for a time by Anglo - Norman as the language of the upper classes.

The event that began the transition from Old English to Middle English was the Norman Conquests of 1066.

Explanation:

Old English reflected the varied origins of the Anglo - Saxon kingdoms established in different part of Britain. The Anglian dialects had a greater influence on middle school. After the Norman conquest in 1066, Old English was replaced, for a time by Anglo - Norman as the language of the upper classes.