Career
Jackman was 24 years old, and a captain commanding Z Company of 1st Royal Northumberland Fusiliers, part of the 70th Division, during the Second World War when the following deed took place during Operation Crusader for which he was awarded the Venture capital. His citation in the London Gazette reads: On 25th November, 1941, at Editor Duda, South East of Tobruk, Captain Jackman showed outstanding gallantry and devotion to duty above all praise when he was in command of a Machine Gun Company of The Royal Northumberland Fusiliers in the Tank attack on the Editor Duda ridge. His magnificent bearing was contributory in a large measure to the success of a most difficult and hard fought action. As the tanks reached the crest of the rise they were met by extremely intense fire from a large number of guns of all descriptions: the fire was so heavy that it was doubtful for a moment whether the Brigade could maintain its hold on the position.
He immediately started to get his guns into action as calmly as though he were on manoeuvres and so secured the right flank.
Then, standing up in the front of his truck, with calm determination he led his trucks across the front between the tanks and the uns—there was no other road to get them into action on the left flank. Most of the tank commanders saw him, and his exemplary devotion to duty regardless of danger not only inspired his own men but clinched the determination of the tank crews never to relinquish the position which they had gained.
Throughout he coolly directed the guns to their positions and indicated targets to them and at that time seemed to bear a charmed life but later he was killed while still inspiring everyone with the greatest confidence by his bearing.