I know. I was talking about AFTER these battles were fought. I've read about 100 (seriously) civil war books, and I am aware that these battles were important. However, at the time of the Fall of Vicksburg, it was the only major port left on the river. Though it had been invested for a while, the river could not have come under complete Union control with a hostil port in the middle of it.Vicksburg ceased to be a port in late 1862 once the Union forces arrived there. The fighting earlier 1862 around Island No. 10 was hardly indecisive. And Teh 49 day siege at Port Hudson which fell on 9 July 1863 was easily as terrible as the Vicksburg siege. While it did not feature the manuever battles of Vicksburg, this success was what actually opened the river.
Good Lord people. Give me some credit.
After Vicksburg, the best the South could have hoped for was the independence of the cotton states.. Because the Union had control of most of Louisiana, some of Mississippi, Arkansas, Tennessee, and Kentucky. The North's advantages in manpower, and industry were all the north needed to eventually defeat the south(post-war annexation included).