Heber C. Kimball, in an August 1857 sermon, teaches that Deseret will take physical action against any U.S. troops who decide to invade the area.
Heber C. Kimball, "Organization—Destruction of Zion's Enemies—Oneness of Spirit in the Priesthood, Etc," Journal of Discourses, 26 vols. (Liverpool: Asa Calkin, 1858), 5:135
Listen to the counsel of God and those men that are placed here; and if you will do that, I can promise you, in the name of Israel's God, and by virtue of my calling, that you never shall be swerved aside, and our enemies shall be overcome every time before they cross that Big Mountain, if we have to do it ourselves.
. . . We intend to kill the poor curses ourselves, before they get to the Big Mountains.