What would happen if Britain had won the second war with the USA (1812-1815)? Let's say the British would send more troops after Napoleon's first capitulation, won more victories and forced the United States to make substantial territorial concessions. For example, to give them all the land north of the 41st parallel and west of Lake Erie, and Maine. Would much larger and more populous Canada be freed from Britain sooner? Will the US try to regain lost areas? How would this affect their policies and economic development?