THE MORMON WAR.

Washington, Saturday, January 9, 1858. From advices received to-day, it appears that the Mormons will not retreat from Utah, as was expected by the Government but will fight it out where they are. This insures a bloody war in the spring. The following orders will be issued from the headquarters of the army on Monday, directing the movement of the troops destined to reinforce the troops now en route for Utah :—

General Orders.— No. 1. Head quarters of the Army, New York, January 8, 1858. The General-in-chief, with the approbation of the War Department, directs the following movements : — 1. The army of Utah will be reinforced as soon as practicable by the Ist regiment of cavalry, 6th and 7th regiments of infantry, and light companies A. and M., 2nd artillery. 2. Forts Smith, WashiU, Arbuckle, and Bellknap will be abandoned 1 for the present, and all the troops comprising the garrisons, except the ordinance sergeants, will at the earlie t possible day proceed to Jefferson Barracks. The companies at Fort Smith, by the Arkansas and Mississippi rivers ; those at Forts Washita, Arbuckle, and Bellknap, by the Red and Mississippi rivers, if transpmtation on the former rivers can be obtained without too great a delay, otherwise by Fort Smith and the first named rivers. 3. The fourth regiment of artillery now in Kansas, will take post as follows : — Head-quarters, with two companies, at Fort Riley ; the Lieutenant-Colonel, with four companies, at Fort Laramie : the junoir Major, with two companies, at Fort Kearney ; and two companies at Fort Leavenworth ; the companies in each case to be designated by the Colonel. The regiment will be put in march for its several stations by the Commading-General of the Department of the West as early as practicable. 4. An officer of rank being necessary at Fort Kearney, the junior Major of the fourth artillery will at once proceed thither, and assume command of the post. 5. In due time further orders will be given for the march of the reinforcement across the Plains, and preliminary measures will be commenced at once by the several staff departments and officers concerned for preparing the troops and the supplies for the movement 6. Measures will also be taken for filling up the regiments and companies to the maximum standard : and also for furnishing recruits for the other troops composing the army of Utah. 7. The several departments of the staff will take prompt measures to secure the public property at the posts to be abandonsd. By command of Lieutenant-General Scott, Irving M'Dowem,, Assistant Adjutant-General.