and their First Nations allies drove the American invaders back into the United States. Without naval control of the Great Lakes they were unable to receive supplies, resulting in the British failure to capture Plattsburgh in the Second Battle of Lake Champlain and their withdrawal from US territory. A brigade under the command of Major General Robert Ross was sent in early July with several naval vessels to join the forces already operating from Bermuda. The combined forces were to be used for diversionary raids along the Atlantic coast, intended to force the Americans to withdraw forces from Canada. Some historians claim that they were under orders not to carry out any extended operations and were restricted to targets on the coast. However, the British had launched three major operations targeting the three largest ports of America at Baltimore, New York City, via Lake Champlain and the Hudson River, and in New Orleans from August 1814 to February 1815 despite the Treaty of Ghent negotiations that started in August 1814. Each of these three expeditions had over 10,000 British Army troops, many of them the best soldiers and officers from the Peninsular War, so they were not just minor diversionary raids. Britain had already captured most of modern-day Maine and re-established the Crown colony of New Ireland in September 1814. This could have been a blueprint of what they had in mind for New York City, Baltimore, Washington, D.C., New Orleans, West Florida, and the whole Louisiana Territory. Britain and their ally Spain voided all treaties and land deals made by Napoleon after his defeat in 1814, especially the Louisiana Purchase. The original British goal was to annex New Ireland permanently, as well as other possible territories from the United States, but they failed to take New York City, Baltimore, and New Orleans. As a result they had to return New Ireland/Maine back to the United States after the ratification of the Treaty of Ghent in February 1815. An ambitious raid was planned as the result of a letter sent to Bermuda on 2 June by Sir George Prévost, Governor General of The Canadas, who called for retaliation in response to the "wanton destruction of private property along the north shores of Lake Erie" by American forces under Colonel John Campbell in May, the most notable being the Raid on Port Dover. Prévost argued that, ... in consequence of the