Answer:
-Oliver Cromwell was an enemy of the king.
Step-by-step explanation:
Oliver Cromwell was an enemy of the king. During the English Civil War, he led the armies of England against King Charles I.
Oliver Cromwell was an English military leader and politician and after defeating King Charles I, he ruled the British Isles as Lord Protector.
Hence, the correct answer is "Oliver Cromwell was an enemy of the king."