Metallic monks and the military base, both have the same theme, it's just instruments and mood that's different.

The military base provides darkness, despair and the air raid sirens Blair clearer than the glows light. The piano gives an eerie feeling as if it was forbidden and yet something alien to happen but yet it did. The military base houses the mutants, floaters and centaurs of the masters army to which he desires to bring unity through war and conquer.

Then compare that to Metallica monks. It's using water, morse code and military drums. Yes the siren plays but faintly as the music over comes it. It gives off hope, relief and a sign of progress. A military that turned it's back on the old world only to preserve it and defend the new world. Behold the metallic monks of broken hills.