[MingShun]

Spoiler for I'm not sure but...:

The background music playing in the background when Konata is giving her briefing is really similar to a Command & Conquer song. We know that the creators also reference songs, like that Initial D scene, so I don't think a game song is too off the mark. Or maybe having trumpets play fanfares to a beat of drums is a popular way to write patriotic war songs. But anyway, the song reminded me of the BG music for the USA side in C&C Generals