The Battle of Osan On the rainy day of 5 July 1950, Task Force (TF) Smith pieced together from the 24th Infantry Division (ID), consisting of 400 soldiers was the first United States (U.S.) Forces during the Korean War to engage in combat. At the Battle of Osan, 1/21 Infantry Regiment made contact with the North Korean People's Army of the Democratic People's Republic of Korea (DPRK). TF Smith received no concept of operation, obsolete equipment and no actionable intelligence. This tragic battle