In the summer months of his sophomore campaign, Peace Rules won the grade one Haskell Invitational Handicap, beating Sky Mesa and Funny Cide at Monmouth Park during the first week of August.
In 2004, at age four, Peace Rules won the Grade II New Orleans Handicap (beating Saint Liam and Funny Cide), the Grade II Oaklawn Handicap (again beating Saint Liam), and the Grade I Suburban Handicap by a neck in a three-horse duel with Funny Cide and Newfoundland.