May 31, 1257Welsh Forces Under Meredudd, Ap Rhys and Meredudd, Ab Owain Ambush a Force of English and Welsh Collaborators
May 31, 1798Beauchamp Bagenal Harvey Is Appointed as Commander of the Insurgent Forces in Wexford Town
May 31, 1900During the Boer War, Piet De Wet Captures the Thirteenth Battalion of the Imperial Yeomanry at Lindle