Final answer:
The question about the Leahy brothers does not have a clear true or false answer without additional context. The market revolution did bring significant changes to the U.S., and the French and Indian War contributed to a common colonial identity, while the Iroquois Confederacy was not entirely neutral during the Revolutionary War.
Step-by-step explanation:
The arrival of the Leahy brothers and the subsequent interactions with indigenous populations is a historical event that should be considered in the context of history and anthropology rather than a straightforward true or false schoolwork question. However, when examining the history of the United States, it is true that the market revolution brought significant social and economic changes to the country. Similarly, it is true that an increasing sense of common identity among the colonists was one of the outcomes of the French and Indian War. Regarding the Iroquois Confederacy during the Revolutionary War, it is false to state that all tribes maintained neutrality; the Confederacy was split and its members took different sides.