|A question from the unwashed and ill-informed :what defines a tier one special operations unit? Would all Army SF teams, SEAL Teams, and USAFSOC be considered tier one, or only Delta, Devgru, SAS etc? What about the CTI cos? Does tier one describe the ability to carry out a greater diversity of mission sets, or is it in the end, merely the unit with the greatest access to the national piggy bank (perhaps inseperable). Do tier one units exist outside of NATO, ANZUS, perhaps Israel,Ireland,and Sweden?