In the mean time, Olympias had determined to come to Macedon, and aid Polysperchon in his contest with Cassander. She accordingly left Epirus, and with a small body of troops, with which her brother Alexander, who was then King of Epirus, furnished her, went on and joined Polysperchon on his return. Eurydice was alarmed at this; for, since she considered Olympias as her great political rival and enemy, she knew very well that there could be no safety for her or her husband if Olympias should obtain the ascendency in the court of Polysperchon. She accordingly began to call upon those around her, in the city where she was then residing, to arm themselves for her defense. They did so, and a considerable force was thus collected. Eurydice placed herself at the head of it. She sent messengers off to Cassander, urging him to come immediately and join her. She also sent an embassage to Polysperchon, commanding him, in the name of Philip the king, to deliver up his army to Cassander. Of course this was only a form, as she could not have expected that such a command would have been obeyed; and, accordingly, after having sent off these orders, she placed herself at the head of the troops that she had raised, and marched out to meet Polysperchon on his return, intending, if he would not submit, to give him battle. Her designs, however, were all frustrated in the end in a very unexpected manner. For when the two armies approached each other, the soldiers who were on Eurydice's side, instead of fighting in her cause as she expected, failed her entirely at the time of trial. For when they saw Olympias, whom they had long been accustomed almost to adore as the wife of old King Philip, and the mother of Alexander, and who was now advancing to meet them on her return to Macedon, splendidly attended, and riding in her chariot, at the head of Polysperchon's army, with the air and majesty of a queen, they were so overpowered with the excitement of the spectacle, that they abandoned Eurydice in a body, and went over, by common consent, to Polysperchon's side.