100 Years Ago Today on 1 Jun 1917

One hundred years ago on 1 June 1917
31st Battery, Canadian Field Artillery, Canadian Expeditionary Force was a sub-unit of the 9th Canadian Field Artillery Brigade in the 3rd Canadian Division. The 9th Brigade war diary records:
Visibility: Misty in the morning but improved and was fairly good in afternoon. Enemy planes very active throughout day – a number crossed our lines. One of our machines was brought down in vicinity of LA CHAUDIERE. Our Artillery was engaged in registration and trench demolition throughout the day. Enemy Artillery was unusually active, paying particular attention to our Front Line and Support Trenches.
O.O. No. 80 issued today. We are to take part in a Barrage, to cover an attack, to be made by the Division on our Left. Zero Hour will be 12 Midnight, night of June 2nd/3rd.
 
5th Canadian Siege Battery, Canadian Artillery, Canadian Expeditionary Force war diary records:
Nothing to report.
 
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.