The US 5th Cavalry's 1st Battalion encountered the 19th and 27th Division's defenses on October 11 as they were holding a long ridge with several knobs — Hills 179, 175, and 174 — that dominated a pass fifteen miles northeast of Kaesong.
During their advance on October 11, the US 5th Cavalry's 1st Battalion encountered strong resistance from the 19th and 27th Division as they occupied a strategic ridge with notable hills – Hills 179, 175, and 174 – that commanded a critical pass about fifteen miles northeast of Kaesong.