The Corsairs must have something more to do and to deal with. It can be like this. The corsairs attack and capture chembridge reserch station and then planet chembridge and maintain strong defensive postion there. Unable to remove them from there (as they are quite well reinforced from cadiz and the resources from chembridge) bretornia made a conditional truce to get help against gallia. Hence we corsirs can test gallic blood too. Or else it will be like watching action from distance. To get rid of galic forces bretonia need strong ships like corsirs.