General Butler was superseded in command at New Orleans by General Banks; and after a time it was planned that Banks should move up with a large force to attack Port Hudson, while an army under General Grant came from above to capture Vicksburg; and the fleets were expected to assist in both of these campaigns.

Great difficulties were met by the national armies, and everything appeared to move with insufferable slowness. The authorities at Washington seemed to think that as Farragut's fleet had passed the batteries below New Orleans, it could pass any batteries, and a spirit of impatience was manifest because the river was not quickly and thoroughly cleared and held. A very important difference in the circumstances was overlooked. The forts below New Orleans were on low ground, and as the fleet sailed by, its decks were nearly or quite on a level with the bastions, which could be swept by the fire of the broadsides. But at Vicksburg and Port Hudson the batteries were on high bluffs and could send down a plunging fire on the ships, to which the fleet could hardly reply with much effect.

Finally, the Admiral received peremptory orders to "clear the river through," which meant, run by the fortifications of Vicksburg and capture or destroy the Confederate vessels above that point that were either afloat or being built. The most important of these was the powerful ironclad ram Arkansas, which was expected to come out of the Arkansas or the Yazoo River into the Mississippi and attack the fleet of gunboats.

Farragut had appeared before Vicksburg in May and demanded the surrender of the place; but this was refused, and without the co-operation of an army the demand could not be enforced. The construction of the defenses then proceeded more rapidly than before, and when his peremptory orders came, late in June, the place was very strong. On the 28th he attempted the passage with ten vessels, aided by the mortar flotilla. While the mortars were raining shells into the works the vessels steamed up the river in two columns, and all passed the batteries except three of the rear division, which, from a misunderstanding of orders, fell back. The losses in the fleet were fifteen men killed and forty wounded. One gunboat received a shot through the boiler, which killed six men by scalding. No other vessel was seriously injured.

Dewey's ship, the Mississippi, did not participate in this exploit. The affair has been described briefly here because of its influence on a later and more hazardous one in which she did take part, to her cost. The passage of the Vicksburg batteries convinced the men of the navy that, with small loss, they could pass any batteries, no matter how situated. Farragut wrote: "The Department will perceive from my report that the forts can be passed, and we have done it, and can do it again as often as it may be required of us."

That was in the summer of 1862, when Vicksburg was but partially fortified and Port Hudson hardly at all. But the Confederate Government awoke to the extreme importance of those points, and the work of fortifying them went on rapidly. In some respects the fortifications of Port Hudson, on the river side at least, were even more formidable than those of Vicksburg. After a reconnoissance in the autumn of 1862, Commander Lowry reported: "The plan appears to be this: to place their works in such a position that, we having passed or silenced one or more of the lower batteries, other concealed batteries open, which will throw a cross fire into the stern of the vessels, which would then be exposed to a cross fire from batteries yet to be approached and silenced and from the masked ones left astern."

In March, 1863, it was arranged that Farragut should run by the batteries of Port Hudson, while Banks, with twelve thousand men, should assail them on the land side. The objects to be gained by running by the batteries were: To concentrate the fleet above Port Hudson for the destruction of the Confederate vessels; to blockade Red River and the bayous; and to communicate with the naval and military forces that were besieging Vicksburg.

Order of attack on Port Hudson.
A. Hartford (flagship), Captain James S. Palmer.
a. Albatross, Lieut.-Com. John E. Hart.
B. Richmond, Commander James Alden.
b. Genesee, Commander W. H. Macomb.
C. Monongahela, Captain J. P. McKinstry.
c. Kineo, Lieut.-Com. John Waters.
D. Mississippi, Captain Melancton Smith.
E. Essex, Commander C. H. B. Caldwell.
F. Sachem, Act. Vol. Lieut. Amos Johnson.
G. G. Mortar schooners.
H. Spot where Mississippi grounded.

On the 14th Farragut completed his preparations, and that night was selected as the time for the movement. His fleet consisted of four ships and three gunboats, besides the mortar schooners and their attendant gunboats. Each of the ships, except the Mississippi, was to have a gunboat lashed to its port side, so that if one were disabled its gunboat could tow it through or out of the fight. The Mississippi could not take a gunboat, because she was a side-wheeler. All the vessels were trimmed by the head, so that if one grounded it would strike bow first and would not be swung round by the current. And the elaborate precautions that had been taken below New Orleans were repeated. The order of the column was this: