okay, decision has been discussed and made.
Major, i'm afraid that you don't have any troops as far as the rules are conserned. You declared yourself as regent and the royal army is more or less putting its feet up until a king is declared.
Wales has picked a good time to rebel, it only has what lords england has to face or negotiate with, and since wales is your fief then i'm afraid you have no men to draw upon, as they are all currently hiding at home or marching against England.
You are allowed the usual 700 man mercs if you can afford it, but in game terms you have no levies or troops to call upon.