Roger Mortimer’s Last Campaign
Archived: 21 October 2026
Abstract
In 1398, the political settlement imposed after Richard II’s first Irish expedition was visibly coming apart. The year’s most consequential firmly dated event was the death on 20 July of Roger Mortimer, earl of March and Ulster, the king’s lieutenant in Ireland. Mortimer was a major lord in his own right, an heir presumptive to the childless Richard II, and the Crown’s foremost military representative in Ireland. His death in a Leinster campaign exposed how limited English authority remained beyond the better-defended lordship towns and lordly estates. That did not make 1398 a simple national contest between ‘English’ and ‘Irish’.