For what it’s worth I was told during the tour that the Bulldog served in vietnam. “Served” may mean that it was combat ready sitting in a shed though.. Lol.

The story I was told about the pockmarked sherman is that it was used for live fire machinegun training until a round came in the drivers periscope. The entire side of it is more or less the same as the turret pic.

The Type 59 was captured by AVRN troops at hai-lang on july 4th 1972 and gifted to Australia, it was rebuilt in working order in Australia in 1980 at which point someone decided to paint “dog” from footrot flats on the rear left side.

Both Centurions are Mk Vs with the 20 pounder gun, Australia never used the 105mm on the Centurion having upgraded to the Leopard 1A4 (designated AS1) instead. The Centurion with the dozer blade isn’t an AVRE or anything, its just a Centurion with a dozer blade (regular tank crew ect).

Both M4 Shermans, the Cromwell, Crusader, the M24 Chaffee and the M41 Walker Bulldog were never used by the Australian Army, they were imported either as a part of a vehicle selection trial or for tropical and desert testing in Northern Australia (yes there are both deserts AND jungles in Australia). M60s and M551 Sherridans were also trialled in the 70s although the Australian Army rejected the M60 in favour of the Leopard and the M551 offer (essentially the US made a deal where Australia let them test it in the jungle and desert and in return if the Australian army liked what they saw they could have first dibs on any exports) was rejected due to multiple perceived faults
(track grip was worse than the M113, sticks and dirt tended to clog the engine air intakes, tended to get swamped when attempting amphibious movement, unburnt propellant from the main armament tended to exit the breach after a round{HE} was fired presenting a risk of cook off)

also AFAIK those dents on the M4 sherman are from machinegun fire, as it was used as a small arms range target. The other Sherman is an M4A2, a third M4 was sent to Australia but it was eventually used as a Range target and subsequently scrapped

Also I think British and I guess Commonwealth tank doctrine was to issue one tank with a bulldozer blade per tank squadron to assist with entrenching as cold war doctrine was to fight a defensive campaign from hull down positions.

The crusader was never used by the Australian army and this particular tank was sent to Australia for desert testing and so it could be examined as part of the Australian tank program. The current gun on the tank is actually wrong (its a 37mm instead of a 40mm 2 pounder) and anecdotal accounts claim that the original gun was actually taken from the tank and mounted on the first prototype AC1 sentinel tank for testing purposes (no other 2 pounders being available at the time)