[Mormon Battalion] Colonel Kearny designated Captain James Allen, later promoted to Lieutenant Colonel, to raise five companies of volunteer soldiers from the able-bodied men between the ages of eighteen and forty-five in the Mormon encampments in Iowa. On 26 June 1846 Allen arrived at the encampment of Mt. Pisgah. He was treated with suspicion as many believed that the raising of a battalion was a plot to bring trouble to the migrating Saints.
[source: Utah History Encyclopedia: Mormon Battalion, http://www.media.utah.edu/UHE/m/MORMONBATTALION.html]