The campaign on and along the Mississippi River started in February 1862 with Union forces pushing down from Cairo, Illinois into disputed territory in Missouri and Kentucky and Confederate territory in Tennessee and ended with the surrender of the last Confederate strongholds on the Mississippi River, Vicksburg, Mississippi on July 4, 1863 and of Port Hudson, Louisiana on July 9, 1863. Flag Officer Foote initially commanded the Union naval forces, which were later led by Farragut and Porter.