His citation for the Victoria Cross, gained in 1918 in Villers-Bretonneux, France, at the age of 37, reads in part:
During the period 17/18 July... Lieutenant Borella, whilst leading his platoon, charged and captured an enemy machine-gun, shooting two gunners. He then led his party, by now reduced to 10 men and two Lewis guns, against a very strongly held trench, using his revolver and later a rifle with great effect and causing many casualties. Two large dug-outs were also bombed and 30 prisoners taken