TAC X Corps set up its headquarters at Kimpo Airfield on 19 September, followed by MTACS-2, MGCIS-1, and VMO-6. The first fighter squadron of MAG-33 to arrive at the new base was VMF(N)-542. Lieutenant Colonel Max J. Volcansek, Jr., the commanding officer, and five pilots landed their F7F-3Ns at 1830 on the 19th after a flight from Itami AFB. This was the baptism of fire for a majority of the squadron’s pilots. Numbering 54 officers and 274 enlisted men when it left El Toro, VMF(N)-542 had only 20 trained night fighter pilots. The remainder were volunteer reservists qualified by “a good experience level and a desire to become night fighters.”[256] [256] 1st MAW _SAR_, Annex Item, VMF(N)-542 rpt. The squadron claimed the distinction of flying the first Marine combat mission from Kimpo at 0735 on the 20th when four of the F7F-3N aircraft destroyed two enemy locomotives after expending some 3,000 rounds of 20mm ammunition. The Corsairs of Lieutenant Colonel Richard W. Wyczawski’s VMF-212 and two aircraft of Lieutenant Colonel J. Frank Cole’s VMF-312 also landed at Kimpo on the 19th and got into action the following day. Conditions were primitive at the outset. In the lack of refueling facilities, the first strikes had to be flown on fuel remaining in the aircraft, and bombs were loaded by hand.[257] [257] 1st MAW _SAR_, Annex Item VMF-212 rpt. It had been an achievement to have two tactical squadrons of MAG-33 in action less than 48 hours after the reconnaissance landing by Generals Harris and Cushman. This accomplishment owed a great deal to the care shown by the 5th Marines to keep damage at a minimum. Lieutenant General George E. Stratemeyer, CG FEAF, expressed his appreciation of this factor in a letter to General Smith: “I want to take this opportunity of expressing my admiration and gratification for the manner in which elements of your Division recently captured Kimpo Airfield and so secured it as to make it available for use by Far East Air Forces and Marine Corps aircraft in the shortest possible time.”[258] [258] O. P. Smith, _Notes_, 212–213. _Progress of Eighth Army Offensive_ General MacArthur had intended the Eighth Army to be the hammer and X Corps the anvil of a great joint operation. During the first few days, however, it sometimes appeared as if these roles were reversed. On 18 September, after a penetration of 16 miles on the X Corps front, the attacking forces in the Pusan Perimeter had just begun to inch ahead against desperate NKPA resistance. In some sectors, indeed, the enemy not only put up a stubborn defense but counterattacked vigorously. (See map in end papers.)