Engines, I can enter the fray.
When the Army joined the Defence Training Estate they 'captured' the RAF bombing ranges. When AOC 1 Gp found out with less than 2 months to go he was incandescent.
An organization with 5 RAFR Sqn Ldr, and a CoC at 1Gp of a flt lt and sqn ldr suddenly had 3 Lt Col and a train of CS added on, the 1Gp element continued but with no control.
The annual conference became biannual. Attendees rose from 8 to a dozen or more. While the people already existed, the T&S more than tripled.