 It ended Admiral David Dixon Porter's efforts to blockade the Red River by detached vessels while keeping the body of his fleet above Vicksburg, Mississippi, and it prompted Farragut's costly run by the South's forts at Port Hudson on 14 March 1863.On the brighter side, it set the stage for one of the most successful hoaxes of the war.A dummy ironclad was made on an old coal barge by building paddle boxes and a simulated casemate complete with logs painted black to resemble cannons.