Which accurately describes a significant outcome of the Monroe Doctrine? A. increased tension between England and the United States due to an alliance with France
B. increased tensions between the United States and Mexico over the control of trade in the Americas
C. the strengthening of American nationalism by asserting authority in the Western Hemisphere
D. the establishment of American dominance by the colonization of former French and Spanish territories
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c) It declared US opposition to European intervention in the affairs of independent countries of the Western Hemisphere

Explanation:

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.

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