What weakened the Iroquois confederacy in the eighteenth century?

The Iroquois Confederacy faced significant weakening in the eighteenth century due to internal divisions, particularly during the French and Indian War, where different tribes aligned with opposing European powers. Additionally, the introduction of European goods and alcohol disrupted traditional social structures and practices. The loss of territory and influence, coupled with increasing pressure from colonial expansion, further diminished their strength and unity. These factors collectively eroded the once-powerful confederacy's ability to maintain its political and military cohesion.