On the surface, it may seem that the War of 1812 was spread on human history pages only with a meaningless bloodshed. After all, all the relations and borders should return to the status cited before the war according to the final Treaty of Ghent. However, look beyond legalistic and practical effects of war and one will find major attitude changes in the United States after conflict, which in the decade following the war lead to what most historians consider to be the "era of good feelings." The war 's biggest American casualties were the Federalist Party, the first American political party to emerge.