The phrase "artillery groups" is correct and usable in written English.
It can be used to refer to organized units or formations of artillery in a military context.
Example: "The artillery groups were strategically positioned to provide support during the operation."
Alternatives: "artillery units" or "artillery battalions".
Four heavy artillery groups, nine artillery field brigades, three divisional artillery groups and the artillery complement of the British 5th Division was attached to the Canadian Corps.
During these bombardments, the newly organised Heavy Artillery Groups were to conduct counter battery work targeting Ottoman guns.
Each corps had a counter-battery area, which was divided into zones and allotted to heavy artillery groups.
These batteries had also been suffering from effective counter-battery fire from the EEF Heavy Artillery Groups.
In addition, ten heavy artillery groups of the flanking I and XVII Corps were assigned tasks in support of the Canadian Corps.
The Canadian Corps' divisional artillery formations, totalling eight field brigades and two heavy artillery groups, were insufficient for the task at hand and were consequently reinforced with outside formations.
Detachments from the divisional artillery group would move forward and were attached to the artillery batteries of the division they were relieving.
Each heavy artillery group headquarters divided their zones into map squares, which were allotted to artillery batteries, required to be ready swiftly to open fire on them.
Also activated from division assets were the 45th Field Artillery Group, later redesignated the 45th Fires Brigade, and the 90th Troop Command.
Most of the artillery, grouped as the "Frew Group" under British Lieutenant Colonel J. H. Frowen, would support the 16th Infantry Brigade; the 17th would be supported by the 2/2nd Field Regiment.
II Anzac Corps created four counter-battery groups, each with one heavy artillery group and IX Corps arranged four similar groups and five bombardment groups, one for each of the three IX Corps divisions making the initial attack and two (with the heaviest howitzers) in reserve, under the control of the corps heavy artillery commander.
