What might have happened if the US had won the War of 1812?
They would have annexed all of British North America. The USA would be much more expansionist in this timeline, and Manifest Destiny would pursue. They would claim everything up to the Alaskan border (like what the British did), including the Oregon Territory. However, the annexation of this much land up north would ruin the balance between Free and Slave states, so the South would be pissed. The USA would need more land for the South, and the Missouri Compromise line would have to be further north. This would happen. The United States would have pushed to annex Texas immediately. This would kickstart the Mexican-American War. Mexico would still lose, but instead of just taking California, New Mexico, and Texas, the USA would annex the next 1/3 of Mexico, since again, the South would need more land. Slavery would be more widespread in this world, due to a much larger area and populace being open to it. Most of the American south would be slave states, Sonora, Yucatan, Rio Grande, Kan