YOKE is one of the concentration calls in the Royal Artillery during WWII that called every gun under the command of an Army Group Royal Artillery headquarters to fire a concentration at a target of opportunity.
Historically, in the 1600s and early 1700s, the British Artillery was funded and organised separately to the rest of the Army.
In part, this was reasonable because it was always centrally raised and equipped
(whereas foot and horse regiments were initially temporary local units, often "sponsored" by a magnate or existing officer)
Aside: Establishing a standing army was VERY politically sensitive at the time
since without any organised police force, foot and horse were seen as (potential) instruments of repression in Britain.
Idiotically that separation continued well past 1800 well after a small standing army was standard practice
e.g. it caused Wellington no end of trouble with Logistics and Personnel in the Peninsular.
One result was that even as late as WW2, the artillery felt that it "owned" all its assets wherever they were assigned
and set up lines of communication and control separate to the whole force organisation.
However, there was one interesting side effect. It allowed the Artillery to concentrate and bring down simply ridiculous amounts of firepower on the direction of a single observer or unit commander. Basically Forward Observation Officers had the ability to request, and some higher
Artillery officers had the authority to order, multi-battery concentrations of fire. These different levels were referred to as,
Mike - Regiment
Uncle - Division
Victor - Corps
William - Army
Yoke - Army Group
So a Mike target has every gun in the artillery regiment firing on it, an Uncle all the guns in the division and a Yoke target was when every single artillery piece in an
army group that could be brought to bear was aimed and fired at a single target.
(Range permitting of course .. and AIUI units already firing elsewhere were usually omitted )
Without a very centralized process of seeking approval from higher level commanders that would slow down the response.
What the commanders of other sectors of the front said when
their designated artillery support was swept away (however temporarily) probably cannot be explicitly written on a family site.