At the conclusion of the Inchon-Seoul campaign in the first week of October, the entire 1st Marine Division embarked on Navy ships and sailed around South Korea and landed at Wonsan on October 26. The division then marched 70 miles north to the Chosin Reservoir area. As Sutter's battalion arrived at Koto-ri on November 24, the Chinese Communist military encircled the entire division and the coldest winter in 50 years descended on Korea. Temperatures fell as low as −35 °F as a blizzard swept the area.