The most important reason for Assyrians military successes was its A. Brave soldiers

B. Location on the Tigris river

C. Use of new technologies

D. Kind treatment of the people it conquered

C. Use of new technologies

Explanation:

In contrast to Babylonian Empire and all other empires before them, Assyrians have developed new war techniques. Ideologically and structurally they had developed an army that was above every other until then. These technologies and military obedience allowed them to rule in the region of Mesopotamia for centuries.