> For the Five Eyes(Canada, US, UK, Australia, NZ) that don’t ever need to worry about conventional invasion
Australia is extremely at risk of conventional invasion, their current independence is a function of alliance to the strongest navy in the Pacific. Without a US that is willing and able to ensure Australia's free access to the surrounding ocean, AU is absolutely unable to deploy enough of their own military to fend of probably even Indonesia, let alone China. The coastline is just far too long, the military assets too few, and the country too depopulated to be able to stop a determined invasion.
Australia is extremely at risk of conventional invasion, their current independence is a function of alliance to the strongest navy in the Pacific. Without a US that is willing and able to ensure Australia's free access to the surrounding ocean, AU is absolutely unable to deploy enough of their own military to fend of probably even Indonesia, let alone China. The coastline is just far too long, the military assets too few, and the country too depopulated to be able to stop a determined invasion.