Description: The Battle of Hulluch was a conflict in World War I, April 27-29, 1916, involving the 16th (Irish) Division of the British Army's 19th Corps.
The Royal Inniskilling Fusiliers on the night of the 27th suffered a heavily-concentrated German chlorine gas attack near the German-held village of Hulluch, a mile north of Loos.
Other units of the 16th Division, including the Royal Irish Rifles, the Royal Munster Fusiliers and The Royal Dublin Fusiliers were called in to stem the German attack.
On the 29th, the Germans attacked with gas again, but this time the wind blew the gas back upon their own troops, crippling a great number.
Hulluch was one of the most heavily-concentrated gas attacks of the war.