The attack on Fort Bridger began on the second of February, but the enemy's position on the mountain heights remained unshaken. Several captive balloons and two motor air-ships (one of which was destroyed, shortly after its ascent, by hostile shots) brought the information that the Japanese artillery and entrenchments on the face of the mountain formed an almost impregnable position. Thus while the people were still rejoicing over the latest victory, the Pacific Army was in a position where each step forward was sure to be accompanied by a severe loss of life. Six fresh divisions from different encampments arrived on the field of battle on the fourth and fifth of February. They received orders to attack the seemingly weak positions of the enemy near Bell's Pass, and then to cross the snow-covered pass and fall upon the left flank of the Japanese center. All manner of obstacles interfered with the advance, which was at last begun. Whole companies had to be harnessed to the guns; but they pressed forward somehow. The small detachments of Japanese cavalry defending the pass were compelled to retreat, and the pass itself was taken by a night assault. Frost now set in, and the guns and baggage wagons were drawn up the mountain paths by means of ropes. The men suffered terribly from the cold, but the knowledge that they were making progress prevented them from grumbling. On the seventh of February, just as Fisher's division, the first of General Elliott's army to pass Bell's Pass, had reached the valley of the Bear River preparatory to marching southward, via Almy and Evanston, in the rear of the Japanese positions, cavalry scouts, who had been patrolling downstream as far as Georgetown, reported that large bodies of hostile troops were approaching from the North. General Elliott ordered Fisher's division to continue its advance on Almy, and also dispatched Hardy's and Livingstone's divisions to the South, while Wilson's division remained behind to guard the pass, and the divisions of Milton and Stranger were sent to the North to stop the advance of the enemy's reenforcements. Milton's division was to advance along the left bank of the Bear River and to occupy the passes in the Bear River Range, in order to prevent the enemy from making a diversion via Logan. Mounted engineers destroyed the tracks at several spots in front of and behind Logan.