MEMORIAL: Confused about dates

There is a beautiful war memorial in Cramlington village centre, but can anyone tell me why it is dated 1914-1919.

Sunday, 24th September 2017, 6:23 am
Updated Wednesday, 27th September 2017, 10:38 am

I thought the First World War ended in November 1918.

Can anyone cast any light on this?

Every other war memorial that I have seen is dated 1914-1918, and there must be a reason.

Thomas Trueman