"Second lieutenant Gunn could refuse a massive German tank attack on November 21, 1941 at Sidi Rezegh in Libya with four antitank guns. During this attack Gunn moved from one to the other position to strength his men by speaking an encouraging word to them. When three of these guns had been eliminated he stormed forward by his own to the only remained gun. Once arrived he saw that the crew had been killed. He decided to control the gun by himself. Before he was killed, he could fire fifty grenades and eliminate two hostile tanks."
Posthumously awarded. Second Lieutenant Gunn’s Victoria Cross is publicly displayed at The Royal Artillery Museum in Woolwich, Great Britain.