Battle of the Lys

The Battle of the Lys may refer to:


 * Battle of the Lys (1918), part of the German Spring Offensive. Also known as the Lys Offensive, the Fourth Battle of Ypres, the Third Battle of Flanders and as the Batalha de La Lys in Portugal.
 * Second Battle of the Lys (1918), part of the Allies' Hundred Days' Offensive
 * Battle of the Lys (1940), a battle during the Second World War near the Belgian city of Kortrijk