During World War II, "Jock columns" were small combined arms groups of armoured cars, artillery, and motorised infantry, generally drawn from the 7th Armoured Division. They were used in the North Africa campaign by the British Army's Western Desert Force to harass German and Italian forces.
They were named after an officer who was a superb exponent of the tactic and may possibly have conceived it originally, Lieutenant Colonel "Jock" Campbell.
References
Jock column Wikipedia(Text) CC BY-SA