Councillor and former Irish Guardsman Kieron Mallon placed a wreath at the Alcan War Memorial during the yearly Alcan service of remembrance.
The ceremony paid tribute to Banbury employees who had been killed in the Second World War and also honoured the factory’s former workforce.
Located in a memorial garden on Southam Road, the Alcan factory was an important part of Banbury’s industrial contribution to the war effort.
It produced aluminium used in aircraft production.
Because of the facility’s significance, a replica operation was established nearby while the original plant was concealed with camouflage to shield it from enemy attack.
The decoy factory was targeted twice by the Luftwaffe.
Across the wartime period, 41 employees died, while 4,000 local residents were employed at the Banbury site.
Before joining Alcan in the late 1980s and 1990s, Mallon had served in the British Army.
He joined other attendees at the ceremony, which recognised the sacrifices made by factory workers during the conflict.