The correct answer is siege.
Gaining control of Vicksburg was essential to the Union's military strategy. Taking control of Vicksburg would allow the Union army to control the Mississippi River. The Mississippi River was the lifeline for the Confederacy, as this waterway allowed them to easily send goods and troops to different parts of the US. Controlling the river would help the Union to stop the Confederacy from being able to transport goods. Along with this, it would also cut off Confederate states (like Texas) from other Confederate states located along the Atlantic Ocean.
For the answer to the question above, It's the large island north of North America. Well, it's not an island at the time, but you know what I mean. <span>Greenland was once part of North America and Eurasia. It wasn't an island by itself.</span>
It was called watergate. Nixon hired men to break into a building to find information on the Democratic Party in washington
Vicksburg was the last stronghold until the Union could have the Mississippi River. If they were to take Vicksburg, they would split the Confederacy and go along with their Anaconda Plan. They did so by starving Vicksburg to surrender.