22 April – 25 May 1915: The Battles of Ypres, 1915. Often known as the Second Battle of Ypres, this began with surprise German attack using poison gas against French North African forces holding defences near Ypres. Both sides rushed reserves in and the battle developed into the second epic in that area. British Second Army withdraws to a shorter line near Ypres.
I am afraid that I have withdrawn the content of this page for a proper rebuild: back soon!