New France
In 1763, France had ceded the rest of New France, except the islands of Saint Pierre and Miquelon, to Great Britain and Spain at the Treaty of Paris, which ended the Seven Years' War (known as the French and Indian War in North America and especially the United States). Britain received Canada, Acadia, and the parts of French Louisiana which lay east of the Mississippi Riverexcept for the Île d'Orléans, which was granted to Spain, along with the territory to the westthe larger portion of Louisiana.
New France
Peace lasted in Canada until 1744, when news of the outbreak of the War of the Austrian Succession (King George's War in North America) reached Fort Louisbourg. The French forces went on the attack first in a failed attempt to capture Annapolis Royal, the capital of the British Nova Scotia. In 1745, William Shirley, governor of Massachusetts, led a counterattack on Louisbourg. Both France and New France were unable to relieve the siege, and Louisbourg fell to the British. With the famed Duc d'Anville Expedition, France attempted to retake Acadia and the fortress in 1746 but failed. The fortress was returned to France under the Treaty of Aix-la-Chapelle, but the peace treaty, which restored all colonial borders to their pre-war status, did little to end the lingering enmity between France, Britain, and their respective colonies, nor did it resolve any territorial disputes.