166th (South Lancashire) Brigade

The 166th (South Lancashire) Brigade was a formation of the Territorial Force of the British Army. It was assigned to the 55th (West Lancashire) Division and served on the Western Front during the First World War.

Formation
The infantry battalions did not all serve at once, but all were assigned to the brigade during the war.
 * 1/9th Battalion, King's (Liverpool Regiment)
 * 1/10th Battalion, King's (Liverpool Regiment)
 * 1/4th Battalion, South Lancashire Regiment
 * 1/5th Battalion, South Lancashire Regiment
 * 2/5th Battalion, King's Own Royal Regiment (Lancaster)
 * 1/5th Battalion, King's Own Royal Regiment (Lancaster)
 * 1/5th Battalion, Loyal North Lancashire Regiment
 * 2/10th Battalion, King's (Liverpool Regiment)
 * 166th Machine Gun Company
 * 166th Trench Mortar Battery