 Between 1667 and 1671, De Ruyter was forbidden by De Witt to sail, so as not to endanger his life.In 1669, a failed attempt on his life was made by a Tromp supporter, who tried to stab him with a bread knife in the entrance hall of his house.The Treaty of Breda which ended the Second Anglo-Dutch War in July 1667 failed to remove the root causes of the long-standing Anglo-Dutch rivalry, which included colonial quarrels, including the exclusion of the English traders from Dutch colonies and the English occupation of the former Dutch New Netherland colony, and English enforcement of the Navigation Act.