I agree with the above that he was put in an impossible position in that if he moved his entire force to contest Grant's crossing the Mississippi, ( as suggested by Joe Johnston), he ran the risk that Sherman might march into Vicksburg unmolested, either approaching from Snyder's Bluff or the riverfront, which meant giving up all the fortified positions and works at Vicksburg. Works that Grant never did breach, by the way. Lee found himself in a similar situation, later in 1864, when Grant maneuvered his way towards Richmond and that city eventually fell. Also, Pemberton never had all the advantages that Grant had with better arms, accoutrements, ammo, equipment, cannon, and so forth. The Yankees had an existing "war machine" whereas the Confederates had to beg, borrow and steal to come up with what they had. Lastly, Pemberton had two of his generals actively trying to undermine his efforts ( Bowen and Loring) which especially cost him the battle at Bakers Creek. Altogether, it is doubtful anyone, even Lee, could have been successful under these circumstances. I think if a part of the Army in Virginia ( say Longstreet's Corps) could have been sent west to bolster the Vicksburg army, then we could have been more successful. For instance look how Longstreet's Corps helped us win at Chickamauga. Here is a quote of Pemberton's: "Far better for me to die at the head of my troops, while leading a desperate attempt to cut our way out, than the obloquy which I know will be heaped upon me. But my duty is to sacrifice myself to save the army which has so nobly done its duty to defend Vicksburg." I think this shows the quality of the man that he in the end tried to save his men than to sacrifice them after such heroic efforts during the 47 days. I wish his remains would be re-interred in Vicksburg, as a tribute to him.