Just skimming over it.... also he forgot one military rule about saluting. I will give you another scenerio: Say a Legates is standing in a room with 10 or so enlisted memebers. A optio rolls up in the room. The enlisted members do not need to salute the optio because there is already a higher ranking memeber in the room. Only the Optio and Legates extend a salute. Now in the case that the Imperator walks into the room it would be appropriate for the Legates to call everyone to attention and render the salute to the Imperator for the whole formation. Thats how we do it in the AF. Also saluting in doors is generally forbidden onless reporting or during a ceremony.