After defeating the Persian army in the battle at Granicus, the army moved south searching for the main force. The main force was led by the ruler of Persia, Darius. The battle happens in a narrow area between the gulf of Issus and mountains on November 5, 333 BC. The macedonian army used its phalanx, and Alexander used his tactics to adapt to the situation. The army had a phalanx in the center, hypaspists on the right, and companion cavalry with Alexander riding with them on the flank. On the left was a mix of heavy and light cavalry, with an infantry in reserve. Far right in the hills, the army had agrarians, elite javelin soldiers, and cavalry. The Macedonian army advances, protecting their flank. Alexander led an attack of the agrarians, and managed to drive off the heavy infantry. Meanwhile the rest of the macedonian cavalry on that flank drove off the persian cavalry. On the opposite flank, the Persian heavy cavalry succeeding in pushing back the weaker cavalry of the Macedonian army. Alexander responded to this by using his infantry. The Macedonians with this infantry put up a defensive line against a possible breakthrough. As the Persian line advanced, placing their flank in the air, they left themselves vulnerable. The Agrarians continued to pursue heavy infantry, while the cavalry turned on the flank of the infantry. Alexander in this moment saw Darius and advanced toward him. He believed that by…