How did the union army gain control of the mississippi river apex?

Winning over the missipi river for the Union was a long process that involved the capture of new orleans and and Fort Donelson. the conguest ended up with the conquest of Vicksburg. these three region were very vital to ensure control of the missipi river, a fete that was made possible by superios water or river craft compared to the confederate forces.

executive, (president and about 5,000,000 workers) legislative (senate and house of representatives) and judicial (supreme court and lower courts)

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if you're talking about (ww2) they went bankrupt and their currency was worth nothing

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