[TXnMA]

"Have we decided what "Castle" is?"

I believe we settled on" RED CASTLE"as "USACOE"

...and... "GREEN CASTLE" as the location of one of the USACOE offices...

[Califreak]

Computer-Assisted System for Theater Level Engineering

Probably too old for our current application

[greeneyes]

Can also be a chess move:

Castling is the only move in chess where two pieces, the king and rook, move at the same time. It can work well as a defensive strategy, but also can free up a rook.