Follow Our Brothers
From Halopedia, the Halo wiki
Follow Our Brothers is a song included in the Halo 3: Original Soundtrack. It plays during the level Floodgate.
The song begins with a slow, single-note melody of strings. Higher strings then join in with a single note. The motif is then repeated with choir in the background. The song then switches to a minor key, still retaining the same slow melody. The strings melody then fades, to be replaced by a more rapid motif. At the end, the music once again fades into the slow melody of the Mjolnir Mix.
Note: The beginning of the song sounds very similar to the High Charity Suite.
It runs for 3:25.