In about September 1915 three local reserve battalions were formed from the depot companies of the eight battalions, with the role of training replacements for the service battalions; they joined 16th Brigade of the Training Reserve on 1 September 1916:[1][2][3]
25th (Reserve) Battalion, Manchester Regiment, (from 16th, 17th, 18th Bn depot companies) became 69th Training Reserve Battalion
26th (Reserve) Battalion, Manchester Regiment, (from 19th, 20th, 21st Bn depot companies) became 70th Training Reserve Battalion
27th (Reserve) Battalion, Manchester Regiment, (from 22nd, 23rd and 24th (Oldham Pioneers) Bn depot companies) became 71st Training Reserve Battalion
Almost 10,000 men enlisted in the Manchester Pals battalions, of whom 4,776 were killed. Overall, the Manchester Regiment lost about 13,000 men.[8] In 1993, a memorial was unveiled in Heaton Park, where the 16th, 17th, 18th, and 19th battalions were trained between September 1914 and April 1915.[9]