In episode 107, Angus talked to Ian Mitchell about the Battle of the Peaks and Longstop Hill in North Africa. Ian subsequently emailed him suggesting he talk to Sam Wallace, a post graduate researcher at Leeds University, who is working on some interesting stuff; Sam's PhD is titled The Allied Sandbox: The Tunisian Campaign and the Development of Allied Warfighting Methods, 1942-43.

After chatting with Sam, they decided to look at his MA thesis which is titled Arme Blanche to Armoured Warfare: The Process of Mechanisation within the British Cavalry and the Construction of British Tank Doctrine, c.1925-45,it covers the interwar decision to mechanise the British cavalry arm, and the impacts this decision had on the resulting development of British armoured doctrine, regimental identity and the effectiveness of British armour in the Second World War.