Description:
The Siege of Port Hudson occurred in the summer of 1863 when 30,000 Union Army troops surrounded the Mississippi River town of Port Hudson, Louisiana. This attack, in cooperation with the attack on Vicksburg, was intended to take the Mississippi River away from the Confederates. The 6,500 Confederate Army soldiers defending the town were able to hold off the Union offensive for 48 days. The Confederate troops surrendered once Vicksburg had fallen. Some 5,000 Union men and 700 Confederate soldiers were killed or wounded during the siege.
Wikipedia
CWSAC -
http://www.nps.gov/history/hps/abpp/battles/la010.htm