The 63rd Brigade was a formation of the British Army. It was raised as part of the new army also known as Kitchener's Army and assigned to the 21st Division and served on the Western Front during the First World War. In July 1916 the brigade was transferred to the 37th Division.
Formation
The infantry battalions did not all serve at once, but all were assigned to the brigade during the war.
References
63rd Brigade (United Kingdom) Wikipedia(Text) CC BY-SA