Admiral Joy’s directive also warned: “The strong probability exists that the ports and possible landing beaches under control of the North Koreans have been recently mined. The sighting of new mines floating in the area indicates that mines are being seeded along the coast.”[32] [32] _Ibid._, B, 11. _X Corps Relieved at Seoul_ The related events, decisions, and plans of September 1950 had unfolded with startling rapidity. Before the scattered UN forces could shift from one phase of operations to another, a transitional gap developed during the early days of October. Orders might flow forth in abundance, but not until MacArthur’s land, sea and air forces wound up one campaign could they begin another. Thus, from the standpoint of Marine operations, the first week of October is more a story of the Inchon-Seoul action than of preparations for the Wonsan landing. On 2 October, when Eighth Army commenced the relief of X Corps, General Almond ordered the 7th Infantry Division to begin displacing to Pusan by motor and rail.[33] There was as yet no such respite for the 1st Marine Division, which on the same day lost 16 killed in action (KIA) and 81 wounded (WIA). Practically all of the casualties were taken by the 7th Regiment, then approaching Uijongbu on the heels of the enemy.[34] [33] X Corps _OpnO 3_, 2 Oct 50. [34] MajGen Oliver P. Smith: _Chronicle of the Operations of the 1st Marine Division During the First Nine Months of the Korean War, 1950–1951_ (MS), (hereafter, Smith, _Chronicle_), 54. Despite the limited planning data in the hands of the 1st Marine Division, General Smith’s staff put a cautious foot forward on 3 October.[35] Word of the pending Wonsan operation went out by message to all subordinate units, with a tentative task organization indicating the formation of three Regimental Combat Teams (RCTs). [35] Gen Wright stated, “There was definitely _not_ a complete lack of planning data. I doubt if any operation ever had more planning data available. It may not have been in General Smith’s hands on 3 October, but it was available.” Wright ltr, 16 Feb 56. The 1st and 7th Marines were earmarked to launch the amphibious attack. Each would plan on the basis of employing two battalions in the assault. These battalions were to embark on LSTs and hit the beach in LVTs. All tactical units were to combat-load out of Inchon. And although still uninformed as to available shipping, the Marine planners named likely embarkation groups and listed tentative arrangements for loading tanks and amphibious vehicles.[36] [36] CG 1stMarDiv msg to Subordinate Units: “Planning Information,” 3 Oct 50.