5th and 7th Marine regiments, 1st Marine Division, at Yudam-ni on Nov. 27, 1950 when the Battle of Chosin Reservoir started.
Billy C. Mossman, United States Army Center of Military History
<a rel="nofollow" class="external text" href="https://www.history.army.mil/html/books/020/20-4/CMH_Pub_20-4.pdf"><i>Ebb and Flow: November 1950–July 1951</i>, Map 7, p. 93</a>