Fortress Study Group [SEP] inception
Fortress Study Group
The Fortress Study Group is a charity registered in the UK with an international membership. It has the of advancing the study of post-medieval artillery fortifications throughout the World. 
History.
The Fortress Study Group was formed in June 1975 at Pembroke College, Oxford amongst the founders were Jock Hamilton-Baillie, who became chairman in 1976, the late Quentin Hughes was the founding editor of the annual journal, and his Royal Highness the Duke of Gloucester remains as patron. Other notable members, past
components of the 57th Operations Group, placing them all under a single organization. Has trained combat aircrews in adversary threat tactics since its inception.
History Lineage.
- Established as 57th Adversary Tactics Group on 31 Aug 2005
History Assignments.
- 57th Wing, 15 Sep 2005–Present
History Components.
- 64th Aggressor Squadron: 15 Sep 2005–Present
- 65th Aggressor Squadron: 15 Sep 2005–26 September 2014
- 527th Space Aggressor Squadron: 14 Apr 2006–Present
- 547th Intelligence Squadron, 15 Sep 2005–2014
- 57th Adversary Tactics