All of the causes for the war had disappeared with the end of the Napoleonic Wars between Britain and France and the destruction of the power of Native Amery opened an "Era of Good Feelings," which reduced partisanship and an exuberant spirit. The British paid little attention to the War of 1812 since they were preoccupied with their final defeat of Napoleon, which occurred in 1815. The Americans failed to gain any territory from British North America, despite many American politicians' hopes and expectations, but still managed to gain land from Spain.