The English lordships in Ireland, in danger of being overrun by the Irish Chieftains, pleaded insistently for the king to intervene In the autumn of 1394. Richard II complied and led a successful campiagn which temporarily ensured English soveriegnty.
Editors. "Richard II, King of England, undertakes campaign in Ireland". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=9589, accessed 31 May 2016.]