Which empire was the first to manifest on the earth?

The Akkadian Empire (2334 BC to 2083 BC) was an empire centered in the city of Akkad and its surrounding region (in Ancient Iraq). It was the first empire to manifest on the earth. The Akkadian state was the predecessor of the ethnic Akkadian states of Babylonia and Assyria; formed following centuries of Akkadian cultural synergy with others, it reached the height of its power between the 24th and 22nd centuries BC following the conquests of king Sargon of Akkad, and is sometimes regarded as the first manifestation of an empire in history.

It reached record-breaking size of its time and is considered the largest empire of the dark ancient era – 0.8 million km2 (2250 BC).