General battle scenes from North Korea, 1950

The video covers the clearing of sea minefields and the landing of the First Marine Division in Korea. It details the Marines' operations along the East Coast and the command structure of US forces, including the 10th Corps and 8th Army. The narrative follows the US forces as they reach the Yalu River, hoping for the war's end. However, the Chinese intervention on November 26 surprises the UN forces, altering the course of the conflict.

What was the reaction of the GIS upon reaching their objective?

What event occurred on November 26 that changed the situation for UN forces?