[Werthead]

The problem with the original question is that the Bridgeburners are only at the forefront of the action in Books 1 and 3. That's it. I imagine we'll see some of the shattered remnants of the group in Book 8, but the rest of them are all dead. The Bridgeburners aren't in Books 2, 4-7 or 9-10 (okay, a few former members of the group crop up but that's it).

From what I can tell, the Bonehunters, who sort of inherit the "Woah!" mantle of the Empire's most kickass legion, are a rather different kettle of fish to both the Bridgeburners and the Black Company.