[OT] More George Lucas bashing.

[Suicide Junkie]

You could still just drop bombs on them. Slow stuff goes through the shield as witness the ground invasion, then Blammo.

Another very easy way would be to have a ground-hugging tank roll in, and deploy a nuke. Everything on the surface gets slagged, in particular turrets and shields, and then you can take prisoners from inside the base to interrogate.

Or sit back and siege them for a little while... big shields must take a ton of power to operate, and you only have to threaten to fire to force them to keep it up.

Or, why not fire back with a similar weapon. Disable the base systems, then slag the defenses, then you win.