How did grant capture vicksburg in may 1863? grant's siege forced the starving confederates to surrender. grant attacked from the north defeating pemberton. grant led a surprise attack across the west bank of the mississippi and captured vicksburg.

The first statement is correct.

The Siege of Vicksburg by the Union army lead to the inability of Confederate soldiers to receive supplies. This is because the Union army takes control of the Mississippi River. This river was used to transport soldiers,materials, and goods for the Confederate soldiers. Maintaining control of this part of the river near Vicksburg lead to the Confederate troops being split in half. This leads to their eventual surrender.