On the appointed night Aratus came with 400 men, carrying scaling-ladders, and placed them in the temple of Juno, outside the city, where they all sat down and took off their shoes. A heavy fog came on, and entirely hid them; and Aratus, with 100 picked men, came to the rock at the foot of the city wall, and there waited while Erginus and seven others, dressed as travellers, went to the gates and killed the sentinel and guard, without an alarm. Then the ladders were fixed, and Aratus came up with his men, and stood under the wall unseen, while four men with lights passed by them. Three of these they killed, but the fourth escaped, and gave the alarm. The trumpets were sounded, and every street was full of lights and swarmed with men; but Aratus, meantime, was trying to climb the steep rocks, and groping for the path leading up to the citadel. Happily the fog lifted for a moment, the moon shone out, and he saw his way, and hastened up to the Acro-Corinthus, where he began to fight with the astonished garrison. The 300 men whom he had left in the temple of Juno heard the noise in the city and saw the lights, then marched in and came to the foot of the rock, but not being able to find
the path, they drew up at the foot of a precipice, sheltered by an overhanging rock, and there waited in much anxiety, hearing the battle overhead, but not able to join in it. The Macedonian governor, in the meantime, had called out his men, and was going up to support the guard in the fort, blowing his trumpets, when, as he passed these men, they dashed out on him, just as if they had been put in ambush on purpose, and so dismayed them in the confusion that they fancied the enemy five times as many, as the moon and the
torches flashed on their armour, and they let themselves all be made prisoners.
By the time morning had come Corinth was in the hands of the Achaians, and Aratus came down from the fortress to meet the people in the theatre. His 400 men were drawn up in two lines at its entrances, and the Corinthians filled the seats, and shouted with an ecstasy of joy, for it was the first time for nearly a century that true Greeks had gained any advantage over Macedonians. Aratus was worn out by anxiety, his long march, and night of fighting, and as he stood leaning on his spear he could hardly rally strength to address them, and while giving back to them the keys of their city, which they had never had since Philip’s time, he exhorted them to join the League, which they did. The Macedonians were expelled, and Aratus put an Achaian garrison into the Acro-Corinthus.
His whole care was to get Greece free from the Macedonians, and he drove them out from city after city, persuading each to join the Achaian League as it was delivered. Argos was still under a tyrant named Aristippus, and Aratus made many attempts to turn him out, by his usual fashion of night attacks. Once he got into the city, and fought there all day, though he was wounded with a lance in the thigh; but he was obliged to retreat at night. However, he attacked the tyrant when out on an expedition, and slew him, but still could not set Argos free, as the tyrant’s son Aristomenes still held it.
However, Lysiades, the tyrant of Megalopolis, was so moved by admiration for the patriot that he resigned, and the city joined the League. In fact, Aratus was at this time quite the greatest man in Greece. He beat the Ætolians, when they were on a foray into the Achaian territories, and forced them to make peace; and he tried also to win Athens and Sparta to the common cause against Macedon, but there were jealousies in the way that hindered his success, and all his enterprises were rendered more difficult by his weakly health, which always made him suffer greatly from the fatigue and excitement of a battle.