Final answer:
During the American Civil War, the Union naval presence was most critical on the western rivers. Control of these rivers, including the Mississippi, was central to disrupting Confederate forces and supply lines. Despite a number of challenges, the Union was ultimately successful in this strategic goal.
Step-by-step explanation:
The Union naval presence was an essential part of land operations during the American Civil War, particularly along the western rivers such as the Mississippi. Control over these rivers was a strategic goal for both the Union and the Confederacy, mainly due to logistical reasons. Union forces, led by General Ulysses S. Grant's Army of the West, aimed to split the Confederacy by securing critical transport and supply routes along these rivers. Significant battles were waged in this region, including at Vicksburg, a crucial commercial center on the Mississippi River.
The Union's superior industrial capabilities, extensive railroad grid, and larger population were vital to sustaining these operations. However, the Union also faced challenges, including needing to establish long supply lines and battle in unfamiliar territory. Ultimately, the Union's control over strategic points along the western rivers was a significant contributing factor to their victory in the Civil War.
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