The manifest destiny is the American belief that the expansion to the west was beneficial and meant to be. So because of this belief they were very determined to have all the, now what we call the American continents, be their territory. We acquired Orgen by signing the Oregon treaty. The reason for this is so the US wouldn’t have to fight with Britain over the Oregon boundaries . The Oregon Treaty meant that Britain gained possession of the land north of the 49th parallel and all of Vancouver Island and the US gained all of the land south of the line. We acquired Texas by four steps. First Annexation Texas which took a lot of time and persuading. Next was the negotiation in 1845 of the Oregon Treaty with Britain. Then the ending of the Mexican-American