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1 DECLASSIFIED 3-102 SEC. 13. juns 317181 Washington, D. C. 12055, 24 July 1952 E.O. 5100.30, Deta Directive JOINT SITREP NO. 519 DOD (Maps attached) From 0700/21 (EDT) to 0700/24 (EDT) From 2100/21 (Korea) to 2100/24 (Korea) 1. Weather: On 21 July 52, weather in Korea varied from a brief period of operational (for flight) to non-operational, On 22 and 23 July weather was operational but with numerous thunderstorms in North Korea during the afternoon and evening hours. Maximum battle area temperature was 97 degrees. (FEAF) (SECRET) 2. Enemy Situation: Enemy elements on 22 July resumed efforts to seize Hill No. 266, west of Chorwon. During 22 and 23 July, attacks of company and reinforced-company size forced UN elements off the crest of the hill, and as the period closed enemy elements were in possession of the crest. South of Panmunjom, probing attacks of two-platoon size and less occurred against positions of the 1st Marine Division on all three days of the period. Probing attacks of company strength were launched against the 3d US Division northwest of Yonchon on 21 July and against the 2d US Division northwest of Chorwon on 22 July. Across the remainder of the front, enemy activity was characterized by sporadic probing attacks up to two-platoon strength with engagements lasting upwards of two hours and scattered but stub- born opposition to UN patrol and raider operations by enemy groups up to com- pany strength with engagements up to three hours duration. On 22 July, four enemy tanks were observed near Hill No. 266. Hostile mortar and artillery fire during the period totalled 10, 278 rounds, of which 5, 543 rounds fell in the I US Corps sector. The total mortar and artillery fire for the week endigng 23 July was 38g 260 rounds, of which 22, 759 fell in the I US Corps sector. Sightings of enemy vehicle traffic for the period totalled 6, 871, of which 4, 034 were southbound. (FECOM) (SECRET) 3. United Nations Situation: ARMY: UN forces in the west sector launched several attacks against the crest of Hill No. 266, but failed to gain the crest against strong enemy resist- ance. As the period closed UN elements maintained positions on the southeast slope of the hill, with no contact reported on 23 July. Elsewhere across the front, sporadic probing attacks were repulsed, and UN forces continued aggressive patrol and raider operations against scattered opposition. The 187th Airborne RCT, re-