Something to think over .....
It's clear from various articles that Russia in the 1950s was considering having to fight in (very) boggy terrain - their Object-279 "saucer" tank with 4 tracks was designed with this partially in mind. Other articles show that they were looking at air-cushion "hover" tanks too. There are many boggy areas in western Russia & across to the Baltic that caused problems for the Germans & escaping Allied prisoners in WW2, tho they are often heavily wooded & prevent vehicles of any sort accessing the area.
So what would the West's response have been if they had to fight Russia in such terrain east of Germany during a hot (but not nuclear) cold war ?? I can't imagine that Cockrane's hover-craft would have been fast-tracked in Britain but maybe by Canada or the US ? .... a SRN-1 with mg-turret & some armour shields, a SRN-4 battle-ship ? Pity there are no SRN-6 PACVs in plastic yet ... tho, years ago, I did have a very nice little one out of a Kellogs box :)
I know there were several archimedes screw type vehicles designed since 1914 & Russia still uses a few for scientific work - they have their benefits & drawbacks ....