Arthur could sense the presences of multiple Transcendents clustered in the Military Headquarters building, with half of them being Divine Humans, while the other half, were gods.
Arthur took care to restrain his power so as not to alert them of his presence as he entered the towering Skyscraper.
On the Colonels' ID was the man's office number, so after studying how the other soldiers in the building acted, he figured out how to use the special elevators to get to the man's office area.
When he entered the Elevator, some Two Brigadier Generals entered right after him and he saluted them like any Colonel would have done.
They acknowledged him with a simple nod and went back to their conversation. From it, Arthur heard that there was some sort of meeting ongoing at the topmost floor which all the Generals were to be present for.