The first breakthrough in truce negotiations, at Kaesong, occurred on 18 December, when lists of prisoners held by both sides were exchanged. Prior to this exchange of lists the UN Command could only speculate on the number carried as missing in action who were in reality held as prisoners of war. The Communists had previously reported only a few dozen names, and then only if it suited their propaganda purposes. Radio Peking, in releasing names piecemeal, had broadcast recordings made by UN prisoners under duress. Far Eastern monitors reported these broadcasts were slanted to give the Communist viewpoint. The 18 December list of 3,198 American POWs revealed only 61 Marines including 2 Navy hospital corpsmen. (Information received from 18 Marines who gained their freedom in May 1951 was sketchy concerning others held at the time and was never accredited as official or authoritative.)[333] Interestingly enough when the Communist negotiators saw the list given them by the UN representative they became irate and tried to withdraw their list. The names of the Chinese and Korean prisoners had been Anglicized and caused considerable difficulty in retranslating the names into oriental characters. [333] Maj J. Angus MacDonald, “The Problems of Marine POWs,” MS available in Historical Archives, G-3, HQMC. Negotiations hit a snag at this point, and no other list was offered by the Red officials until the first prisoner exchange (Operation LITTLE SWITCH in April 1953). Notwithstanding the protracted and exasperating tactics of the Reds at the truce table, the exchange of prisoner of war lists presaged infinitely better treatment to the UN prisoners than had been accorded them prior to that time. The so-called lenient treatment policy by the Chinese, promulgated in July 1951, was initiated after the exchange of lists.[334] [334] Maj G. Fink, interview of 16 Dec 1960; Extract of Interim Historical Report, Korea War Crimes Division, cumulative to 30 Jun 1953, 18. The lists given by the Communists did not include several Marines captured during the months of October, November, or December of 1951. The families of these men were to sit in anguish waiting for these names until April of 1953. These and other instances of perfidy and treachery at the truce table by the Communist negotiators were to become legion.[335] [335] Joy, _How Communists Negotiate_, 104–105; Maj J. A. MacDonald, “The Problems of Marine POWs,” _op. cit._ On 19 December the 2d Battalion, 5th Marines (Major William E. Baugh) was relieved just behind the MLR by Lieutenant Colonel Norton’s 1/5 in helicopter Operation FAREWELL. It was the last flight in Korea for Lieutenant Colonel Herring, who returned to Quantico as commanding officer of Marine Helicopter Experimental Squadron (HMX)-1. His relief as commander of HMR-1 was Colonel Keith B. McCutcheon, and Lieutenant Colonel Mitchell remained as executive officer.[336]