The surrender of Louisbourg by the French to the British Army in 1758. In 1745, the fortress was attacked by a New England militia and surrendered but it was was returned to the French in the terms of the settlement in 1749, falling again in this seige (depicted here) of 1758. The Siege of Louisbourg was a an important battle in the Seven Years' War (known in the US as the French and Indian War), ending French colonial control of Atlantic Canada.