Manifest destiny was a widely held cultural belief in the 19th-century United States that American settlers were destined to expand across North America. The mission of the United States to redeem and remake the west in the image of the agrarian East.
Manifest destiny was a widely held cultural belief in the 19th-century United States that American settlers were destined to expand across North America. ... The mission of the United States to redeem and remake the west in the image of the agrarian East. An irresistible destiny to accomplish this essential duty
He did that because rome started to fall and was taking pressure by north countries.Byzantium was the best solution because of it's geographic location and it could control the trade