How many slaves escaped along the underground railroad between 1810-1850

By one estimate, 100,000 slaves escaped from bondage in the South between 1810 and 1850. Aiding them in their flight was a system of safe houses and abolitionists determined to free as many slaves as possible, even though such actions violated state laws and the United States Constitution.

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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.

d. migration