stop loss
A clause in an GI's contract allowing the government to hold you past your ETS date for war or other national emergencies to keep your unit at or near 100% strength. In the case of a deployment they can hold you up to 90 days after redeployment but a Liutenant Colonel or higher can release you earlier if you finish outprocessing sooner than 90 days. It's simular to stop movement but that stops you from PCSing to another unit.