Final answer:
False. Some tribes in the Iroquois Confederacy supported the British and fought against the American colonists, while others supported the Americans and fought alongside them.
Step-by-step explanation:
The statement is false. All of the tribes in the Iroquois Confederacy did not maintain neutrality during the Revolutionary War. Some tribes, like the Mohawk and Seneca, sided with the British and fought against the American colonists, while others, like the Oneida and Tuscarora, supported the Americans and fought alongside them.