how might Iroquois have been helpful in assisting the british troops in the suprise attack

There is no historical evidence to suggest that the Iroquois Confederacy specifically assisted British troops in a surprise attack. However, it's worth noting that during the American Revolutionary War (1775-1783), the Iroquois Confederacy, also known as the Six Nations (Mohawk, Oneida, Onondaga, Cayuga, Seneca, and Tuscarora), was divided in its allegiances.

Some tribes within the Iroquois Confederacy sided with the British, while others supported the American colonists. This division among the tribes was a result of differing perspectives on how best to preserve their interests and maintain their autonomy in the face of European colonization.

The Mohawks, for example, were known to be allies of the British during the Revolutionary War and were involved in several military engagements on the side of the British forces. However, it's important to clarify that there's no widely recognized historical record of the Iroquois playing a direct role in a surprise attack that significantly influenced the outcome of a specific battle.

If you have a particular event or historical context in mind, please provide more details, and I can try to offer a more specific response.