On February 14 the Rainbow received its orders to move into the front lines and relieve the 45th Infantry Division in an area near Wimmenau and Wingen in the Hardt Mountains northwest of Haguenau. Two days later the Division began its move into the lines and it was completed without incident. At midnight on February 17 the command of the sector passed to Major General Harry J. Collins and the Rainbow Division began its first day of combat as a unit in World War II.