Although the Pentagon disbanded the special operations task force, the Field Operations Group which had supported it survived because the Army realized that it had a capability gap., US Army Intelligence Support Activity (USAISA), also known as ISA, The Activity, GREY FOX and, in recent times, the Mission Support Activity (MSA), is a top secret Army intelligence unit. The Activity grew out of the need for specialized intel support for US Special Operations that was highlighted by the failed US attempt to rescue American , ISA has gone by many names over the years but its current one is not public knowledge. Its purpose is unlike many other special operations forces of the US military, not dedicated to direct combat, and more towards secretive and clandestine actions necessary to support other military operations., The ISA plays a crucial role in supporting U.S. military operations through its specialized intelligence gathering capabilities. Its history, operations, contributions underscore its importance within the broader framework of U.S. defense strategy., This 1989 memo terminates the use of the terms ISA and "GRANTOR SHADOW" - the later being the current designation of the special access program that protected information about ISA (previously it was known as ROYAL CAPE). The memo does not abolish ISA, however., .