He was 20 years old, and a private in the 2nd Battalion, Australian Imperial Force during the First World War when for his conspicuous bravery he was awarded the VC.

His citation read:[2] For most conspicuous bravery and devotion to duty when his platoon was held up by an enemy strongpoint, and severe casualties prevented progress.

Private Kenny, under very heavy fire at close range, dashed alone towards the enemy's position, killed one man in advance of the strongpoint who endeavoured to bar his way.

In Sydney, Kenny rejected an offer to join the military police, whom it is said he disliked intensely, and was subsequently discharged on 12 December.

[1] Returning to civilian life in Australia, Kenny began working as a travelling salesman for Clifford Love & Co. (manufacturers, importers and merchants).

Though he never talked openly of his wartime experiences, Kenny always led the VC awardees in the Sydney Anzac Day march.