Initially, the division did not fare well, though it improved quickly. Its anti-aircraft and armor assets were used as mobile artillery, which continuously pounded Chinese positions. The 45th, in turn, was under constant artillery and mortar attack. It also conducted constant small-unit patrols along the border seeking to engage Chinese outposts or patrols. These small-unit actions made up the majority of the division's combat in Korea. Chinese troops were well dug-in and better trained than the troops of the inexperienced 45th, and it suffered casualties and frequently had to disengage when it was attacked.