Contrary to what the question might imply, the people of Newfoundland did not play a significant direct role in the Seven Years' War (1756–1763). While the conflict was global—spanning Europe, North America, the Caribbean, West Africa, and India—Newfoundland's involvement was peripheral.
Thus, Newfoundland's contribution to the war effort was limited to its strategic value as a fishing resource and naval waypoint, rather than active combat participation by its residents.