of snow and significantly delayed Crook's progress. Temperatures fell so low that the thermometers of the day could not record the cold. Crook's column slowly followed the Bozeman Trail north to Old Fort Reno, reaching it on March 5. There, the expedition established its supply base, leaving the wagons and Infantry accompanying the column, Companies C, and I, of the 4th U.S. Infantry, under Captain Edwin M. Coates. The five Cavalry battalions then marched to the head of Otter Creek. On March 16, scout Frank Grouard saw two Indian warriors observing the soldiers. He identified them as Oglala Lakota and believed that the camp of Crazy Horse might be nearby. This was reported to Crook, and at 5 p.m. he divided his command and sent Colonel Joseph J. Reynolds (a West Point classmate of President Ulysses S. Grant, and a combat veteran of both the Mexican–American War, and Civil War) on a night march with about 383 men, with rations for one day, following the trail of the two Oglalas southeast toward Powder River. Crook kept with him about 300 men. That night Frank Grouard and the other scouts followed the two Oglala Sioux's trail in the snow. It led right to what they were looking for, an Indian village, which they described as containing more than 100 lodges on the west bank of Powder River. The scouts immediately reported this information back to Colonel Reynolds. Plan of attack In frigid weather, Reynolds' plan was for one battalion, Companies I and K, of the 2nd U.S. Cavalry under the command of Captain Henry E. Noyes, to descend the steep hills south of where the second field hospital would be established to the valley floor. One company, (K) under Captain James Egan, was to attack the southern end of the village. The other company (I), under Captain Noyes, was to capture the Indian pony herd estimated at 1,000 animals, grazing and spread out through the valley on both sides of the river. A second battalion, Companies E and M of the 3rd U.S. Cavalry, under the command of Captain Anson Mills, was to attack the village simultaneously from the west, and the remaining Cavalry battalion, Company E, of the 2nd U.S. Cavalry, and Company F of the 3rd U.S. Cavalry, under the command of Captain Alexander Moore, was to occupy the ridges north and west of the village, to prevent the