Just off hand, when was the last time a Member of Congress was expelled. It certainly isn’t common. Violations, OTOH, are as common as dirt.
Was Trafficant expelled?
In any case, expulsion is the Constitutional provision for dealing with inept, criminal, traitorous, etc., members of our Congress.
The Commander in Chief, in his capacity as CIC, with troops in the field and maneuvering against an enemy, would keep operation secrets as to location, date, time, and nature of those military operations. He would keep it to himself and the soldiers to themselves. I think that’s assumed in the Constitution in the title “Commander in Chief”.