"TEWT" . . . ?I'm guessing you need to have exercise types explained to you?
There's accounts on ARRSE of Radio operators on exercise when over the radio comes the chemical attack warning. They then quickly nip to the tent next door and stick their heads in to see if everyone is wearing their Respirator. the Tent next door was their higher command station "several miles" away.
If memory serves, in the good old days it used to be called an "Exercise with out troops" or some such.
Not every exercise requires you to be all tactical out in the mud, which adds quite a lot to the cost I suspect, and would likely irritate the locals.
Tactical Exercise Without Troops . . ?