Once back in Tokyo, MacArthur issued on 17 October a new order that would become effective if Pyongyang fell before X Corps landed at Wonsan (as was the case four days later). This draft established parallel zones of action for EUSAK and X Corps in North Korea, with the Taebaek Range as the dividing line. The restraining line for UN Forces was advanced as much as 60 miles to a lateral drawn through Chongsanjangsi-Koingdong-Pyongwon-Toksil-li-Pungsan-Songjin (see Map 1). ROK Forces, of course, would still drive all the way to the borders of Manchuria and the USSR.[97] [97] CG’s Diary Extracts in X Corps _WD_, 10–25 Oct 50; Schnabel, _Korean Conflict_. On 24 October, just as the 1st Marine Division was preparing to land at Wonsan, General MacArthur did away with the restraining line altogether. The original restriction on the advance of UN elements, he told his subordinate commanders, was based on the possibility of enemy capitulation. Since there appeared to be no prospect of a formal surrender, he now authorized Generals Walker and Almond to use whatever of their ground forces were necessary to secure all of North Korea. And he enjoined them “... to drive forward with all speed and with full utilization of all their force.”[98] [98] CinCUNC msg CX 67291, 24 Oct 50; X Corps _WD Sum_, _Nov 50_, 5. The commander in chief received a message from JCS the next day, telling him that they considered his new order “not in consonance” with their 27 September authorization, which had stipulated a policy of using only ROK ground forces in the provinces bordering Russia and Manchuria. The matter had caused some concern in Washington, the Joint Chiefs said, and they wanted to know MacArthur’s reasons for making the decision.[99] [99] JCS msg 94933, 24 Oct 50; Truman, _Memoirs_, II, 372. In reply they were informed that the commander in chief’s decision was a “matter of military necessity,” since the ROK Army lacked both the strength and the seasoned commanders required for securing North Korea. MacArthur added that the 27 September authorization had “... merely enunciated the [restraining line] provision as a matter of policy,” and had admitted the possibility of JCS instructions being modified in accordance with developments. He stated further that he possessed the authority to so modify from Secretary of Defense Marshall himself, who had told him “... to feel unhampered tactically and strategically....” Assuring the Joint Chiefs that he understood the reasons for their apprehension, he warned that “... tactical hazards might even result from other action than that which I have directed.”[100] [100] CinCFE msg 67397, 25 Oct 50; Truman, _Memoirs_, II, 372. And there the matter rested. _Landing of 1st Marine Division_