The importance of the Battle of Tours was

This battle stopped the northward advance of Islam from the Iberian peninsula , and is considered by most historians to be of macrohistorical importance, in that it halted the Islamic conquests, and preserved Christianity as the controlling faith in Europe, during a period in which Islam was overrunning the remains of...

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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