Although it was produced in big numbers, tank never saw combat and it was retired after the war. Model AC4 was outfitted with very effective 76,2 mm cannon that was also equiped on US tank destroyer M10.
Later models, like AC3, were equiped with 87,6 mm cannon that was intended for penetrating heavy armor. First examples we're finished in January 1942 and they got name 'Sentinels'. It was named AC 1 (Australian cruiser 1). It was outputted with 3 Cadillac engines inside hull. The Sentinel was made in 1942 as a Australia's reaction to Japanese attacks on Darwin and other Australian ports and places.The prototype was armed with 40 mm cannon, and other weapons and equipment that was mostly derivated from american M3 light tank.
