If one’s sovereign power invades another common-wealth with the intention of waging war and conquering it, a subject may refuse to fight, even if it is against the law; however, if one’s common-wealth is invaded by another sovereign power, a subject is
not at liberty to refuse to fight, as the common-wealth and the covenant is in danger. Since the covenant of a common-wealth is entered into willingly, it can be reasonably assumed that a subject does not want that power destroyed.