The Brigade traces its historic title back to the First World War when the original 107th Infantry Brigade fought with distinction, alongside its sister formations of 108th Infantry Brigade and 109th Infantry Brigade, as the senior component of 36th (Ulster) Division. In September 1914 it was raised the 1st Brigade of that Division, but on 2 November 1914 it was renumbered 107. The 36th Division itself had been formed in September 1914 as part of the New Armies raised by Kitchener. It consisted of the old Ulster Volunteer Force, which had originally been raised to resist the imposition of Home Rule.