By the middle of the 1600s almost all goods imported into the American colonies came into the colonies through the new England supports. There a relationship with a great Britain was therefore greatly affected by

Revolutionary war

Explanation:

By the middle of the 1600s almost all goods imported into the American colonies came into the colonies through the new England supports. Their relationship with a great Britain was therefore greatly affected by  the American revolutionary war.

As a result of the American Revolutionary war, ties were broken between the American colonies and Great Britain which badly affected trade between them.

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