The Battle of Fort Beauséjour was fought on the Isthmus of Chignecto and marked the end of Father Le Loutre's War and the opening of a British offensive in the Acadia/Nova Scotia theatre of the Seven Years' War, which would eventually lead to the end of the French colonial empire in North America. The battle also reshaped the settlement patterns of the Atlantic region, and laid the groundwork for the modern province of New Brunswick.Beginning June 3, 1755, a British army under Lieutenant-Colonel Robert Monckton staged out of nearby Fort Lawrence, besieged the small French garrison at Fort Beauséjour with the goal of opening the Isthmus of Chignecto to British control. Control of the isthmus was crucial to the French because it was the only gateway between Quebec and Louisbourg during the winter months. After two weeks of siege, Louis Du Pont Duchambon de Vergor, the fort's commander, capitulated on June 16.