over 8,600 Korean soldiers to the division. The Colombian Battalion was at times attached to the division. With the addition of priority reinforcements from the US, the division strength was eventually increased to 25,000 when it entered combat. Also fighting with the 7th Infantry Division for much of the war were members of the three successive Kagnew Battalions sent by Emperor Haile Selassie I of Ethiopia as part of the UN forces. The division paired with the 1st Marine Division under US X Corps to participate in the Inchon Landing, code named Operation Chromite. The two divisions would be supported by the US 3rd Infantry Division in reserve. Supported by 230 ships of the US Navy, X Corps began landing at Inchon on 15 September 1950, catching the Korean People's Army (KPA) by surprise. The 7th Infantry Division began landing on 18 September, after the 1st Marine Division, securing its right flank. X Corps quickly advanced to Seoul and the 1st Marine Division attacked the 20,000 defenders of the city from the north and southwest, while the 7th Infantry Division's 32nd Infantry Regiment attacked from the southeast. The 31st Infantry followed behind. Seoul fell to X Corps after suffering moderate casualties, particularly for the Marines. The division then began advancing south to cut off KPA supply routes. The 32nd Infantry crossed the Han River on 25 September to create a bridgehead, and the next day, the division advanced to Osan south of Seoul and linked up with the 1st Cavalry Division of Eighth United States Army which had broken out from the Pusan perimeter starting on 16 September and then began a general offensive northward against crumbling KPA opposition. Radio miscommunication and attack from nearby KPA forces caused a miscommunication, the soldiers of the 1st Cavalry and 7th Infantry briefly engaged in a small-arms firefight with one another, unable to communicate. Seoul was liberated one day later with the help of air assets from the 1st Cavalry Division. The combined forces of the Eighth Army cut off and captured retreating KPA forces. X Corps was kept separate from the rest of the Eighth Army to avoid placing a burden on the logistical system. As part of the UN offensive into North Korea 7th Division withdrew to Pusan to conduct another amphibious assault on the east coast of North Korea. The entire battle for Inchon and Seoul cost the division 106