[2][3] After arriving in southern Italy with a force of 20,000 men, 3000 horses and a fleet of 40 galleys, Dionysius decided to lay siege to Caulonia.
[citation needed] To force Dionysius into relaxing his siege, the League commander Heloris decided to leave his camp and march north towards Elleporus with his army which numbered 25,000 infantry and 2,000 cavalrymen (mostly composed of Syracusan exiles).
In response, Dionysius lifted the siege and marched his army to Elleporus 7 km (4.3 mi) away from the enemy.
The disorganised and scattered forces of Heloris became easy prey for Dionysius's well organised phalanx and fled after hearing that their leader had been killed.
[4] Dionysius I of Syracuse went on to conquer southern Italy (Magna Graecia), heavily defeating the Italiote (Greek) League.