The Defense Department identified three major units on Friday that will deploy to Afghanistan in winter or spring as part of a scheduled rotation of forces. The deployments will include around 4,200 personnel from two brigade combat teams and roughly 620 division headquarters personnel, according to a DOD news release.

Brigade Combat Teams:

1st Brigade Combat Team, 10th Mountain Division, Fort Drum, N.Y. 4th Brigade Combat Team, 101st Airborne Division (Air Assault), Fort Campbell, Ky.Division Headquarters: