The title should explain it, if not, this video is a text/music video which shows how certain soundtracks in Fire Emblem games are used more than once.
And the player phase in the beginning chapter if FE2: Gaiden was used in a later chapter of FE6: Sword of Seals. Why won't Intelligent Systems release the early six games?!
Actually the theme from FE3 "For who's sake", is not reused as the Bern theme, it is reused in "Strategem" (I think that's the name), that plays when Marquess Laus talks in FE7.
The recruit theme, "Together, we Ride!" originated from Fire Emblem 1: The Dragon of Darkness and the Sword of Light. Hey can you make more of these vids?
Here's One For you. There's a Song on FE7, I can't remember the Name but you 1st hear it when yu recute General Wallice for the 1st time. It can also be heard in Path of Radiance although there again I can' remember the title of it.