Final answer:
The claim that the Iroquois Confederacy maintained neutrality during the Revolutionary War is false. Conflicting allegiances among the Six Nations led to a split within the Confederacy, with some tribes supporting the British and others backing the Americans.
Step-by-step explanation:
The statement 'All of the tribes in the Iroquois Confederacy maintained neutrality during the Revolutionary War' is false. While the Iroquois Confederacy, also known as the Haudenosaunee Confederacy, initially attempted to remain neutral at the onset of the conflict, internal divisions led to members of the Six Nations taking sides. The Mohawk, Seneca, Onondaga, and Cayuga nations mostly aligned with the British, whereas the Oneida and Tuscarora supported the American revolutionaries. This division was largely encouraged by the differing opinions of leaders within the Confederacy, such as Joseph Brant who supported the British, and the Oneidas who were influenced by their long-standing relationship with American missionaries and settlers.