The Legion has no civilians Mr Morreti. Over all these years they have not gained remotely even the sympathy of one of Liberty's Big Three. They are isolated and politically stale. No family would ever abandon their civilian life to join a terrorist organization. Not in substantial numbers at least. All these so-called "civilians" are a creative manipulation of numbers and in some cases Hellfire personnel with civilian clothing.
In any case you are asking for information and I'll provide you as much as I can without compromising the security of my allies. The Unioners are dispatching two battleships, fourteen cruisers, thirty seven gunships and five fighter airwings exclusively for Kansas operations. While I cannot disclose their exact location or objectives I would strongly recommend to reach out to the Unioners, gain their trust, and together coordinate a massacre on the so-called America Freeport.
As you have correctly pointed out this will prompt a strong and swift response from the Legion, decisively weakening their Vespucci defences where the main assault is going to take place.