How did the Siege of Vicksburg contribute to the outcome of the American Civil War?

The Siege of Vicksburg divided the Confederacy and proved the military genius of Union General Ulysses S. Grant (1822-85). Vicksburg was one of the Union's most successful campaigns of the war. ... After defeating a Confederate force near Jackson, Grant turned back to Vicksburg.

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answer; elasticity of the lungs decreases;