 He also fought at the battle of Kentish Knock and the battle of the Gabbard during this war.Tromp's death during the battle of Scheveningen ended the war, and De Ruyter declined an emphatic offer from Johan de Witt to assume supreme command because he considered himself 'unfit' and also feared that it would bring him into conflict with Witte de With and Johan Evertsen, both of whom had more seniority.Later, De Ruyter and De Witt became friends.