After the capture of Vicksburg in July 1863.
Mississippi river.
The river-port of Vicksburg - a major Confederate garrison.
because they wanted to have control of the all of mississippi.
The Vicksburg Campaign, specifically the Siege of Vicksburg, allowed the Union to take control of the Mississippi River.
The victory, followed of that of Port Hudson allowed Union to take the control of the whole Mississippi River.
Part of the Northern strategy was to take control of the Mississippi River. Vicksburg was a large and powerful city on the river, heavily defended, and it had to be taken in order to complete this stratgy.
Control of New Orleans meant control of the Mississippi River and therefore control of the hear land of North America. Jefferson would want to have more power within having New Orleans in his hands to Mississippi River as well.
During the American Civil War, the North's success in gaining control of Vicksburg, Mississippi, in July of 1863, resulted in much more than the conquest of yet another Southern city. With Vicksburg in hand, the North now gained control of the entire Mississippi River, thereby breaking the South into two separate halves and opening up the Deep South to invasion.
It allowed the union to take control of the Mississippi River.
If the North controlled the Mississippi River they could cut the Confederacy into two by cutting out Texas, LA, and AR. it also helped the North in the Anaconda plan because they can block the Mississippi river off and take control of the Confederate forts along the Mississippi.
It allowed the union to take control of the Mississippi River.
During the Civil War, the goals for the Union were to create a naval blockade on southern ports, gain control of the Mississippi River, and take over the Confederates capitol of Richmond, Virginia.