The akkadians

established the first empire

developed cuneiform writing

built the first ziggurat

invented the wheel

established the code of hammurabi

The answer is "they  established the first empire."

Explanation:

The Akkadian empire was built by Sargon the Great, the first ruler ever who built an empire in human history.  Sargon is believed to have ruled ca. 2340–2285 B.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.

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.