sentences:  During this time period, Acadians and Mi'kmaq participated in various militia operations against the British and maintained vital supply lines to the French Fortress of Louisbourg and Fort Beausejour.During the French and Indian War (the North American theatre of the Seven Years' War), the British sought both to neutralize any military threat Acadians posed, and to interrupt the vital supply lines Acadians provided to Louisbourg, by deporting Acadians from the region.Once the first wave of the Expulsion of the Acadians began in mainland Nova Scotia, Acadians arrived on the Island as refugees.