Who were the four powers that convened at the Congress of Vienna, and what were some of the important outcomes of the meetings? Which areas were restored and which changed?

Explanation:

During the Congress of Vienna, the great powers of Europe (Great Britain, Austria, Prussia, and Russia) guaranteed each other�s independence by ensuring that no one country could dominate the continent.The victorious countries included Italy, Spain, and the group that would come to be known as the great powers: Austria, Great Britain, Russia, and Prussia. Shortly after the Congress of Vienna began, Napoleon returned to France and regained his rule as emperor for 100 days. i hope dis helps

c

explanation:

c

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.