The Little Entente was a Yugoslav-Czechoslovak alliance formed to defend against Hungarian irredentism. It was supported by France and joined on the 17th by Romania.
Citation:
Editors. "'Little Entente' formed".
The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=12822, accessed 22 May 2013.]