Under Your Hurdles
From Halopedia, the Halo wiki
Under Your Hurdles is the twenty-fourth track of the Halo Wars: Original Soundtrack.
The track opens with a solo clarinet playing a somber rendition of the first two phrases of the Gregorian chant from the Halo Theme. Synthesizers enter, playing in ambiance before fading out.
Under Your Hurdles and X-06, which also features the same somber rendition of the Halo Theme, were the only tracks in the soundtrack composed by Kevin McMullan, the Audio Lead for Halo Wars.