Meetings were held with Cap. Van Vliet. He requested help with provisions for the troops and informed Brigham Young that an army station was to be established within 30 miles of SLC. He presented Brigham Young with a July 28 letter from Gen. Harney which announced that the purpose of the Army was to establish a new military district in Utah Territory. This was the first official notification of the impending Army presence, coming four months after Pres. Buchanan's decision and two months after the first troops left Ft. Leavenworth for SLC.
[Source: Hale, Van, Mormon Miscellaneous, Utah War Chronology, http://www.mormonmiscellaneous.com/utahwar/id2.html]