The two Marine regiments had been in effect the infantry of X Corps up to this time. But Almond promised the Marine general that the 32d Infantry of the 7th Infantry Division would be moved up on the right flank of RCT-1. This Army unit, it may be recalled, had made an administrative landing at Inchon on the 18th and gone into an assembly area under 1st Marine Division control. The other two regiments of the 7th Division were the 31st Infantry, due to arrive on the 20th, and the 17th Infantry, still attached to the Eighth Army. The X Corps commander lost no time at ordering the 32d to move up on the right, after reverting to the control of the 7th Division, to relieve the 1st Battalion, 1st Marines. This was the first of a series of maneuvers carried out on the 19th in preparation for the river crossing. On the left, the 2d Battalion of the KMCs advanced against negligible opposition to occupy the high ground south of the Han and provide flank protection for the crossing. A more intricate maneuver was carried out when 1st Battalion of the 5th Marines was relieved west of Yongdungpo by its opposite of RCT-1, which had sideslipped to the left after the 32d Infantry moved up in protection of the regiment’s right flank. This shift was not accomplished without some fighting, the account of which belongs in a forthcoming chapter dealing with the battle for Yongdungpo. Another preliminary step was taken on the 19th when the 1st Amphibian Tractor Battalion was relieved of its mission of supporting the 1st Marines. All LVTs were withdrawn as the unit displaced by motor march to the vicinity of Kimpo Airfield, a distance of about 18 miles.[284] [284] 1st MarDiv _SAR_, Annex Tare Tare. The 1st Shore Party Battalion was also concerned in planning for the river crossing. On the 19th this unit reverted to Division control and displaced to the vicinity of Oeoso-ri. Meanwhile, a reconnaissance detail reported to the CP of the 5th Marines with a mission of selecting DUKW, LVT, and ferry sites. The shore party battalion was also to have the responsibility of establishing evacuation stations and supply dumps on both banks after the crossing while exerting LVT and DUKW traffic control.[285] [285] 1st MarDiv _SAR_, Annex Mike Mike. Except for the 1st Battalion, the 5th Marines had no trouble on the 19th while advancing to its assigned positions on the south bank of the Han. All objectives were occupied against little or no opposition, placing the regiment in position for the crossing. CHAPTER X Crossing the Han _Swimming Team Leads the Way--Marine LVTs Grounded in Mud--Daylight Assault Crossing by 3/5--Departure of General MacArthur--Supporting Arms of Bridgehead--Command Ashore Assumed by X Corps_