In which major conflict did England fought in in the first half of the XVII century, anyway?
Apart for some little help to the Huguenots against the Kingdom of France and mercenaries here and there, and a mostly (if not only) naval war with the ducthies in the fifties it had only the Civil War. No involvement in the East, no involvement in the Thirty Years War (apart from mercenaries). That would really be an out of place faction.