 It came at a time when no declaration of war had been issued by either country.This frontier aggression known as the Jumonville affair set the stage for the French and Indian War (a US designation; in Canada it is usually referred to as the Seven Years' War, although French Canadians often call it "La guerre de la Conquête" ["The War of Conquest"]) in North America.By 1756, France and Britain were battling the Seven Years' War worldwide.