From: https://americanindiancoc.org/native-american-tribes-the-indian-history-in-wickenburg-arizona/
“The early nineteenth century in the United States was marked by its steady expansion to the Mississippi River. However, due to the Gadsden purchase, that lead to U.S. control of the borderlands of southern New Mexico and Arizona as well as the authority over Oregon country, Texas and California; America’s expansion did not end there. Between 1830 and 1860 the United States nearly doubled the amount of land within its control.
These territorial gains coincided with the arrival of hordes of European and Asian immigrants who wished to join the surge of American settlers heading west. This, combined with the discovery of gold in 1849, presented captivating possibilities for those ready to make the long trip westward. As a result, with the military’s protection and the U.S. government’s assistance, many settlers set about establishing their homesteads in the Great Plains and other areas of the Native American tribe-inhabited West”