Two Army units are headed to Afghanistan amid thinning hopes that the U.S. will reach a peace deal with the Taliban.
The 1st SFAB commander says future deployments are likely to be in smaller units, rather than brigades.
The 2nd Security Force Assistance Brigade assume the Army's advise-and-assist mission to support Afghan security forces.
The 2nd Security Force Assistance Brigade is nearly at full strength and preparing for a deployment early next year.
The expansion comes at a time when the U.S. military generally uses smaller teams in remote regions of the world.
Bashar al-Assad's army objects to any form of U.S. presence in the country and will seek to put an end to it.