In the United States military, Tier 1 units are frequently referred to as Special Mission Units (SMU). They are a classification of Special Operations Forces,
The United States Special Operations Command (USSOCOM or SOCOM) is a unified combatant command of the U.S. military responsible for overseeing all special operations forces.
The Tier-system is designed by JSOC (Joint Special Operations Command) to prioritize which Special Operations Forces receive the most funding. Tier 1 receives the most,
