The U.S. expansion in the 1800s was not very justifiable, especially because the Americans’ best reason for doing so is Manifest Destiny. Whether by controversially expanding the country through democracy or by force, Americans and Mexicans alike saw that the US expansion into areas such as Florida and Texas were invasions permitted by God, instead of the stronger federal army’s strength. Especially during the Mexican-American War, President Polk used a few Americans’ deaths along patrolling the Rio Grande an act of terrorism, prompting years’ worth of bloodshed. Additionally, US expansion often included expensive purchases for lands such as the Louisiana and Gadsden Purchases, which perpetuated the country into further debt along with the
