BTW Telperion, I do think the 3e Bard is pretty much designed as a 'support' characters - they work better as Cohorts than as PCs IMO.
Have you considered retiring the Bard and bringing in a new PC? If the GM lets your new PC be of similar level to the others it should be easy to create a character useful to a military campaign. Clearly information-gathering types are out, so here's some other possibilities:
Eg - if you create a battle-oriented Sorcerer, you should have no trouble overshadowing the Wizard in combat. He can cast his Diviniations and such while you fireball the enemy into oblivion.
Or, you could create a min-maxed melee machine, who can chop up the enemy while that Fighter is bellowing orders from the sidelines.
Or how about a DEX-based archer assassin/sniper type, nailing enemy mages and commanders with his deadly longbow shafts. A PrC like Arcane Archer or Deepwoods Sniper would work well here.
Another possibility would be to create a Fighter-type PC who's a subcommander in the army, maybe a knight or noble. A PrC that gave morale-boosting powers would be good here; your unit could become very valuable, even if you don't always obey your leader' orders to the letter...
Or maybe a Cleric or Druid? As written, these are probably the all-round strongest classes in 3e. Cleric is great in that you can Summon powerful allies (maybe _too_ powerful) for the big battles, and use deadly magics on your foes. If the campaign features religion at all, you could use it to inspire the troops into a fighting-fervour of religious fanaticism, also creating your own power base within the army - who would dare disobey the Voice of God?
