Maighande was a battle towards the end of the Trolloc Wars in aproximately 1301AB (Lord of Chaos, Glossary). The victory of the human forces marked the turn of the wars and began the push towards the Blight. One of Mat's Memories is of leading the flank in the battle (TFoH, Ch. 5).
(Reference: The World of Robert Jordan's “The Wheel of Time” Chapter 10).