The AC1 Sentinel was a cruiser tank designed in Australia in World War II in response to the war in Europe, and to the threat of Japan expanding the war to the Pacific or even a feared Japanese invasion of Australia. It was the first tank to be built with a hull cast as a single piece, and the only tank to be produced in quantity in Australia.
The few Sentinels that were built never saw action as Australia’s armoured divisions had been equipped by that time with British and American tanks.
This Sentinel at the Tank Museum in Bovington was one of three not disposed of by the Australian government at the end of the war.