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The President EDIC CRE T Washington, D. SEC. 3.4.07 June Date 18, sing, 18 January 1951 JOINT DAILY SITREP NO. 178 (maps attached) 1 E.O. NARS, From 0700/17 (EST) to 0700/18 (EST) Directors From 2100/17 (Korea) to 2100/18 (Korea) DOD 1. Situation in Brief: By Only a few minor engagements occurred during the period. The heaviest fighting took place in the ROK III Corps area where elements of the 18th and 23d ROK Regiments engaged 2 enemy battalions northwest of Namdae, inflicting an estimated 300 casualties. In U.S. IX Corps' patrol actions, elements of the 6th ROK Division engaged 2 CCF companies, ap- proximately 7 miles west of Ichon, and the 27th British Commonwealth Infantry Brigade encountered a smaller group farther east. In the U.S. X Corps area, patrols entered Wonju without opposition. However, in the Corps' rear area, numerous sightings and contacts indicated the con- tinued movement south of considerable numbers of organized guerrillas and North Korean troops which threaten supply routes and installations., particularly in the Yechon-Andong area. Task Force 77 aircraft flew 169 sorties and aircraft from the BATAAN flew 35 sorties. On 17 January, U.N. aircraft under FEAF control flew 797 sorties. (FECOM) (SECRET) 2. Weather: Broken to overcast middle and high clouds with visibility restric- ted to 3 to 5 miles in early morning hours, improving to unrestricted. Forecast: Broken to overcast low, middle, and high clouds with visibility restricted to 1 to 3 miles, weather to improve to scattered low clouds by 1800/19 (KT). Minimum temperatures in battle areas will be 20 degrees F. (FEAF) (SECRET) 3. United Nations Situation: GROUND a. U.S. Eighth Army: Effective at 2400/17 (KT), the boundary between the U.S. IX and X Corps was moved to the east of the Chungju- Mungyong-Hamchang highway as follows: from Chungju southeastward to Bench Marks 667, 1106, and 956, thence south to Makkong and Taebong (2 1/2 miles southeast of Hamchang). Defense Line "D" has been modified in the ROK III Corps sector so that it runs approximately east from Chong- son to the Corps boundary. (FECOM)(SECRET) b. U.S. I Corps: Opposite the U.S. I Corps in the Suwon-Seoul area, an enemy build-up appears to be in progress. Air observed enemy Sim CASH'S B.