The U.S. Army plans to transfer 100 soldiers into the U.S. Space Force beginning in 2021, according to service officials and budget documents.

It’s the first time any service outside of the Air Force has identified members that will transfer into the Space Force, the new branch of the military within the Air Force created in December. The Navy has yet to say how many of its sailors it plans to transfer. The Air Force plans to shift some 6,000 airmen into the Space Force by year’s end and more in the years that follow.

The soldiers will already have space-related training and jobs — military occupational specialities, in Army parlance — Maj. Gen. Paul Chamberlain, deputy assistant Army secretary for budget, told reporters on Tuesday.