Actually, the Nazis did that; they just couldn't figure out how to wake him up. So the Soviets got Cthulhu and pretty much everything else of value in Eastern Europe.
They are also the first to use weaponized shoggoths to fight mujaheddin in Afghanistan.
And Cthulhu gets used. And the world ends in a hideous apocalypse-type thing. And the US response to the Soviet weaponized Cthulhu? Nuclear-powered bombers armed with special nuclear-powered cruise missiles. And that's also an example of Truth in Television: See Here for the lowdown on 'Project Pluto'.