However , Vixen soon departed in search of two Tripolitan warships and was not present when Philadelphia grounded and was captured on the 31st .
Commodore Preble dispatched Vixen and the frigate Philadelphia in October to establish a blockade of Tripoli .
Vixen soon departed in search of two Tripolitan warships and was not present when Philadelphia grounded and was captured on the 31st .
Commodore Preble dispatched Vixen and the frigate Philadelphia in October to establish a blockade of Tripoli .