The Insulindian Civil War was not the first war to see the use of aerostatic aircraft on both sides, but it was the longest. For eight years folded multi-rotor aircrafts criss-crossed the air above Revachol, Ozonne, Face-A-La-Mer, and the Arcade Islands. They made sweeps over sandy beaches and shot each other out of the blue sky, then sank as wrecks to the bottom of the sea. The Ace's High was a custom on the revolutionary side, performed by squadron mates after landing. Lieutenant Kitsuragi likes it... why is that?
For the rest of the world the Ace's High is *just a cool Revachol* thing, politically neutral. In Revachol it still holds revolutionary connotations. Also, have you looked at Lieutenant Kitsuragi's *clothes*? He wears a bomber jacket, just like the ones worn by aerostatic brigades. And those cargo pants could store tools for hotfixing your aerostatic... maybe you should ask him about this?
Requires 2h 45m research time
Completing this thought allows you to discuss Kim's clothes with him.