Final answer:
The Iroquois Confederacy failed to get the land west of the Allegheny due to conflicts with other tribes and European colonization.
Step-by-step explanation:
The Iroquois Confederacy, a union of Native American tribes, failed to get the land west of the Allegheny due to a combination of conflicts with other tribes and European colonization. The Iroquois were engaged in territorial disputes with other tribes, such as the Shawnee and Delaware, who also claimed the land. Additionally, European powers, such as the British and French, were expanding their colonial influence in the region through wars and treaties, which disrupted the balance of power and weakened the Iroquois' position.
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