166th (South Lancashire) Brigade

South Lancashire Brigade 166th South Lancashire Brigade 166th Infantry Brigade
55th Division insignia, World War II
Active	1908-1919 1920-1939 1944-1945
Country	United Kingdom
Type	Infantry
Size	Brigade
Part of	55th (West Lancashire) Division
Engagements	World War I

The 166th (South Lancashire) Brigade was an infantry brigade of the British Army that saw active service in the First World War and remained in the United Kingdom throughout the Second World War.

Raised in the Territorial Force as the South Lancashire Brigade, it was attached to the West Lancashire Division and was composed of the 9th and 10th (Liverpool Scottish) battalions of the King's Regiment (Liverpool) and the 4th and 5th battalions of the South Lancashire Regiment.

These later became 166th (South Lancashire) Brigade and 55th (West Lancashire) Division respectively, in 1915. The brigade served with the division on the Western Front during the Great War.

The brigade and division were both disbanded after the war as was the Territorial Force which was reformed in 1920 as the Territorial Army. The brigade was also reformed as the 166th (South Lancashire) Infantry Brigade and again joined the 55th (West Lancashire) Infantry Division which was also reformed in the Territorial Army.

In 1939 war with Nazi Germany was becoming increasingly likely and, as a consequence, the Territorial Army was doubled in size with each unit forming a duplicate. The 55th Division raised the duplicate 59th (Staffordshire) Infantry Division and the 166th Infantry Brigade was subsequently redesignated the 176th Infantry Brigade and was transferred to help form the new division.

A new 166th Infantry Brigade was raised in the Second World War from the redesignation of the 199th Infantry Brigade. The brigade had previously served with the 66th (East Lancashire) Infantry Division until it was disbanded in June 1940 and transferred to the 55th Division and reformed it as a standard infantry division. continued to serve with the 55th (West Lancashire) Division from 1944 until the end of the war.