Nonetheless city-states that employed the practice in determining military formation enjoyed some success. The Thebans are said to have had one such regiment as the core of their entire army. They attributed this group called the Sacred Band of Thebes for making Thebes the most powerful city-state for a generation until its fall to Philip II of Macedon. Philip II of Macedon was so impressed with their bravery during the battle he erected a monument that still stands today on their gravesite. He also gave a harsh criticism of the Spartan views of the band: