Details of Sargon's life are mostly based on the ancient Sumerian King List, which is more propaganda than history.
There is dispute about the date of his birth, death and reign and also if he was really the first great king;
Lugal-Zage-Si could also lay claim to that title.
Nonetheless, his name made it into history, acquiring a legendary status, making him the best candidate.
Before Sargon, rulers of the Mesopotamian city-states had limited themselves to waging war against their immediate neighbors,
by raiding and putting on pressure with short sieges.
But the new king did not fight to establish supremacy of one city over another.
He dreamed of something greater: a true, multi-ethnic empire, with its base in his own city of Akkad.
He succeeded because of his strong army and mostly because he developed siegecraft to a high level,
using sappers, earthen ramps and siege towers.
Once defeated, cities were stripped of their walls and all symbols that attributed to the power of the previous rulers.
Some were even razed to the ground.
All this was done to make sure that when the army marched on to new targets, the cities could not effectively rebel and re-assert their former power.
Sargon also introduced a postal system that used clay tablets, standardized weights and measures.
He maintained a semi-standing army that is rumored to have numbered 5,400 men.
Despite all these measures the Akkadian elite still left much of the actual government to the traditional rulers.
Akkadian taxes were resented and the lack of ethnic, cultural, spiritual or political unity made the power base feeble.
When Sargon died, his son immediately faced a empire-wide rebellion that had to be put down.
Other successors too frequently had to fight to remain in power.
War Matrix - Sargon of Akkad
Early Bronze Age 2200 BCE - 1600 BCE, Generals and leaders