One hundred years ago on 23 May 1917
31st Battery, Canadian Field Artillery, Canadian Expeditionary Force had recently become a sub-unit of the 9th Canadian Field Artillery Brigade in the 3rd Canadian Division. The 9th Brigade war diary records:
Visibility Fair. Enemy Heavy Artillery has been most active today. Considerable movement in the Enemy’s back country has been reported by our F.O.O’s. Any parties within range were taken on and dispersed. A Trench Motor located at T.13.a.1.9. became active at 2.15 this morning. Our 36th How. Battery fired upon it and obtained two direct hits.
Our infantry was successful in capturing and consolidating Post , as ordered in O.O.No.77. This necessitates the issuing of O.O.No.78, today, which slightly changes our S.O.S. barrage, in the vicinity of this Post.
5th Canadian Siege Battery, Canadian Artillery, Canadian Expeditionary Force war diary records:
Battery returned from rest at Divion and moved to new position near Souchez. C Gun was put in and got ready for action by the afternoon. At 4.20. P.M. we fired 20 Rounds for registration on Trench Junction at N32a. 1.1. Observed by Capt L.C. Ord ground observation.
The 15th Field Artillery Regiment RCA perpetuates the following sub units:
31st Battery, Canadian Field Artillery, Canadian Expeditionary Force,
5th Canadian Siege Battery, Canadian Artillery, Canadian Expeditionary Force,
68th Battery, Canadian Field Artillery, North Russia Expeditionary Force, was not authorized to be formed until 3 August 1918, and
85th Battery, Canadian Siberian Expeditionary Force was not authorized to be formed until 12 July 1918.