American Manifest Destiny was an aggressive movement with the purpose of imperialism, which disregarded all other nations and people. The entire concept of Manifest Destiny is that Americans have an ordained right to expand across the continent and therefore acquire land without any regard for those they push off that land or hurt, such as the Native Americans and Mexicans. This can be seen in the start of Mexican-American war when President Polk ordered American troops to enter disputed territory between the two nations, which initiated hostility and led to violence and all out war with Mexico. Ultimately, Mexico was crushed and forced to relinquish half their territory in the Treaty of Guadalupe Hidalgo, furthering American imperialism at