If there had been no attempts at keeping cotton from the European mills, instead a rush to export and gain hard currency before the blockade got effective, combined with the Mosquito fleet working better with Fort Jackson and Fort St Phillip, meaning Farragut does not capture New Orleans, how much longer would the US Civil War be?
The CSA will have some more currency for imports and probably some better access to credits in Europe due to this, they will keep New Orleans (a major city, industrial site, population center) and probably have a better riverine fleet. Mississippi is closed for the Union from the south and they will have to fight their way from the north.
How much longer does the US Civil War last because of this?