Command economies, as in the former soviet union, often have terrible shortages of common consumer goods like bathroom tissue. how do market economies usually avoid such terrible shortages? in command economies, incompetent leaders make foolish decisions while market economies have smarter leaders command economies plan their production so that there will be some shortages. in market economies, consumers learn not to want things that are not supplied, so there can never be a real shortage in a market economy. in market economiesshortages push prices up leading to a greaterquantity supplied

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.

they made rome the dominant power in the mediterranean.