The "corps of loyalists" he defeated at Mamaroneck was led by the famous Indian fighter Robert Rogers (soldier). Legend has it that Washington wept over his corpse on the battlefield and notes by Washington's stepson confirm that Washington did come across Haslet's body at Princeton, but does not mention any shedding of tears. Haslet was first buried at the First Presbyterian Church cemetery in Philadelphia. By an act of the Delaware General Assembly on July 1, 1841, his remains were disinterred and moved to the Presbyterian Cemetery in Dover, Delaware. In 2001, the State of Delaware dedicated a monument to honor him at Battle Monument Park in Princeton, New Jersey. John Haslet was perhaps the best soldier Delaware had to offer, and the next best soldier, his good friend Caesar Rodney, rushed to the Continental Army to try and fill his place. Haslet was succeeded as colonel by David Hall as Rodney returned home to be Delaware's wartime Governor, but the regiment Haslet had built remained among the finest in the Continental Army until it was virtually destroyed at the Battle of Camden in 1780.