Final answer:
King Sargon's conquering of all of Sumer was an important accomplishment as he created the world's first Empire.
Step-by-step explanation:
King Sargon's conquering of all of Sumer was an important accomplishment in history because he created the world's first Empire. Prior to Sargon's conquest, Sumer had dominated the ancient world. However, with Sargon's rise to power, he unified and expanded the territories under his control to create a vast empire that included Sumer and other regions.
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