[464] Presentation of this second Korean PUC to the 1st MAW was made by South Korean President Rhee in impressive ceremonies 12 June at MAG-33 headquarters, K-3. Among the many ranking military officials attending the ceremony was Admiral Radford, former CinCPacFlt, and newly-appointed Chairman, Joint Chiefs of Staff. The fighter-bombers of MAG-33 and the MAG-12 attack planes saw heavy action during 24–30 June when the Chinese again concentrated their attention on ROK divisions in the UNC line. Peak operational day was 30 June. Marine squadrons alone executed 301 sorties, including 28 percent of the CAS and 24 percent of total FAF interdiction missions. It was also an outstanding day for MAG-12 which “outdid itself by flying 217 combat sorties against enemy forces. The 30th of this month saw MAG-12 establish a new ordnance record when an all-time high of 340 tons of bombs and napalm were dropped on North Korea.”[465] Contributing heavily to this accomplishment was Marine Attack Squadron 121. It unleashed 156 tons of ordnance, a squadron record. It was believed this also established an all-time record for tonnage expended on the enemy by a Marine single-engine propeller squadron. [465] MAG-12 ComdD, Jun 53, p. C-1. _Other Marine Defense Activities_[466] [466] Unless otherwise noted, the material in this section is derived from: _PacFlt EvalRpts_ No. 5, Chaps. 2, 8, No. 6, Chaps. 2, 9; WCIDE(U) ComdDs, Oct 52-Jun 53; ECIDE(U) ComdDs, Oct 52-Jun 53; Cagle and Manson, _Sea War, Korea_; Field, _NavOps, Korea_. Like their counterparts on the Korean mainland, the Marines, naval gunfire teams, and ROK security troops comprising the West Coast and East Coast Island Defense Commands felt the alternating pressure build-up and slow-down that typified the closing months of the war. At both installations the defense had been recently strengthened, more or less by way of response to a CINCPacFleet intelligence evaluation in December 1952. This alerted the isolated island forces to the possibility of a renewed Communist attempt to recapture their positions. The Allied east coast defense structure at Wonsan, right at the enemy’s own front door just above the 39th Parallel, was considered particularly vulnerable.