Jan 12 1918 York and Lancaster Regiment, proba…

Jan 12 1918 York and Lancaster Regiment, probably in the 2/4th Battalion of the 187th Brigade, uses a mirror periscope attached to his bayonet to look over the top of a trench on the 62nd Division Front between Oppy and Gavrelle https://t.co/SCiXZiEWrw https://t.co/YrNfnoxfPV http://twitter.com/ThisDayInWWI/status/951588989839921152