Kammala jumla mai zuwa: An ci gaba da zama kwamandan a ranar 24 ga Afrilu, 1828, da kuma kyaftin din a ranar 28 ga Fabrairu, 1838. An sanya shi a matsayin kwamandan jirgin ruwa a kan jirgin farko zuwa Bahar Rum a 1842. A watan Disamba na 1843, Voorhees ya shiga rundunar sojan Brazil ta Commodore Daniel Turner ta kewaye Montevideo don kare kasuwancin Amurka a lokacin yakin basasa na biyu na duniya.
Yakin basasa na Uruguay.