100 Years Ago Today on 2 September 1917

One hundred years ago on 2 September 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:
The visibility today was fair. No enemy balloons were observed up today, but four enemy planes patrolled their own lines in the early morning, two of which crossed our lines and flew over our rear area for about half an hour, flying very high. Enemy movement appeared to be below normal today, but a considerable number of trains were observed in the rear area between MUERCHIN and CARVIN.  Enemy artillery was below normal, except for some heavy counter battery work which they carried out in the neighborhood of the LOOS CRASSIER.
Operational Order Number 105 was issued today relating to relief of the 9th Brigade, C.F.A. by the 6th Divisional Artillery, R.F.A., to take place on the night of the 4th/5th September.                                                                                                                                                                                                                    
3rd Canadian Divisional Artillery war diary records:
BRAQUEMONT -  The enemy is doing considerable new work on his trenches. Artillery on both sides was more active than usual. Our back areas being shelled by H.V. guns. The 3rd C.D.A.C. was relieved by the 6th D.A.C., and marched to PETIT SERVINS. Ammunition expended: A171, AX207 and BX170. Guns in action: 80 - 18pdrs., 21 - 4.5" hows.             
 
5th Canadian Siege Battery, Canadian Artillery, Canadian Expeditionary Force was a sub-unit of 1st Canadian Heavy Artillery Group. Their war diary records:
ANGRES - Lieut. F.R. May proceeded to 11th Brigade as Liaison Officer..
 
1st Canadian Heavy Artillery Group war diary records:
Cabaret Rouge – Considerable harassing fire for two days on enemy front line strong points and rear areas.  On 2nd Sept. 260th Siege Battery, R.G.A., left this group, proceeding to BRUAY en route to another area.
 
General Officer Commanding, Royal Artillery, Canadian Corps war diary records:
In the Field - Situation normal. Some wire-cutting by heavy artillery and house destruction in LENS.
 
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.