sentences:  Following a long period of assault, the siege was abandoned after it was realised that the fortifications of Rhodes were too powerful and well defended.Among other uniquely designed siege machines employed by Demetrius was a giant ram over 60 metres long, requiring over 1000 men to operate, and which was also designed by Epimachus of Athens.After the siege, the Helepolis was abandoned near Rhodes, despite Demetrius' desire to keep it from harm during the Siege.