What was the name of the alliance of several northeast groups?

The most powerful alliance in the Northeast was the Iroquois Confederacy. It contained tribes like Cayuga, Oneida, Onondaga, Tuscarora, and Seneca. The intent of the alliance was to establish peace between the tribes. Before the alliance, the tribes could go to war if an agreement was not made. But peace also gave the opportunity to the tribes to focus on military power to conquer other indigenous tribes.

Explanation:

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