Just using basic commands, you won't be able to accomplish this, as only 12 units per group are supported. I am sure some advanced scripting, with creative use of the join command would work, but seems to me once the Officer orders the sergeants, they then join and lead their squads, and the officer will be out of the chain of command. ALMOST anything is possible through scripting, but I've never seen this brought up, it will give me an interesting project to play with!