All this time, however, he was very far from being satisfied, or feeling that his work was done. Darius, whom he considered his great enemy, was still in the field unsubdued. He had retreated across the Euphrates, and was employed in assembling a vast collection of forces from all the Eastern nations which were under his sway, to meet Alexander in the final contest. Alexander therefore made arrangements at Tyre for the proper government of the various kingdoms and provinces which he had already conquered, and then began to prepare for marching eastward with the main body of his army.