I'm editing my dad's memoirs and learning as I go, but even Google could not help with a single hit on either one of these terms. To put them in context, I think they're something to do with columns of troops/gunners in North Africa in early 1942. He was in an anti-aircraft brigade. "At this stage the army conceived the idea of small mobile columns that could hit small pockets or convoys of Axis forces whenever found. Consequently we, at different times, formed part of Hoycol and Guycol; in the former we had some success in shooting up German transport trucks and downed two Stukas when we were attacked. In Guycol we were confined within the Tobruk perimeter but did bring down a Macchi 202 fighter..." Has anyone heard either of these terms before, or does anyone have any bright ideas about what they could refer to?