Here is the half of the very middle Babylon 5 episode Severed Dreams that includes the battle with Earth Force – and a fair amount else besides.
I can't find the whole episode anywhere on-line, but even just this half should show just why this won the awards it did, in one case gaining more votes than all other entries put together.
Stand by for 22 minutes that will touch you on many levels. Trust me on this, seriously...
Severed Dreams - Mod DB