Which war began the modern era? a. world war i b. the american civil war c. world war ii d. the chinese civil war (choose one)

The correct answer is A) World War 1.  

The war that begun the modern era was World War 1.  

World War 1 was the first great war of the century. This was a global event that initiated on July 1914 until November, 1918. It was one of the largest, bloodiest, and deadliest conflicts in history of humanity. Historians believed that it mobilized almost 70 million military people. The battle was fought by two sides. One side was the alliance called the Triple Entente, formed by Russia, France, and Great Britain. The other side was the alliance called The Triple Alliance formed by Germany, Italy and Austria-Hungary. Eventually the Triple Entente won the war but a high cost.

answer; /// i believe that the correct answer is( it left behind rich

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.