In the aftermath of a disastrous earthquake at Sparta, the helots revolted but in the end had to surrender the stronghold of Ithome (the future Messene).
Bouchard, Elsa. "Third Messenian War". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11205, accessed 21 October 2014.]