The Goths to whom Valens had conceded settlement on Roman Thrace rebelled and crushed Valens' army.
Citation:
Bouchard, Elsa. "Battle of Adrianople and death of Valens".
The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11556, accessed 19 May 2013.]