What WW2 Commonwealth Tank was a better design the Canadian Ram or the Or the Australian AC Series.?
To help with the last part of your question just look at the geography. How are you going to cooperate on the design of a tank with nations on 3 different continents during wartime? Also keep in mind that at the outbreak of WWII neither Canada nor Australia had any tank design experience or production facilities. Canada in particular was not going to get much help from the British who could not meet their own demands so they needed to use items of equipment it had access to – namely the American M3 medium tank. The Australian’s had similar problems and were far more likely to have access to U.S. mechanicals than British and thus used the M3 gearbox and American automobile engines. Each user had its own unique requirements and a joint design would have instituted unnecessary comprimises for no gain. As it turned out both the Canadian and Australian tanks were obsolete by the time they entered production and neither was used in combat. By the time they were read so were quantities of cle
