They also had the first Submarine launched ballistic missile.
They had the largest stockpile of nuclear weapons for many years.
They developed the most potent nuclear weapons.
Can you be more specific?
Fortunately this will never happen but I have always been curious about how US technicals would fare in a ground-war in Russia. My bet is that they would fail most of the times with no possibility of easy fixes, at least compared to their Soviet (now Russian) equivalents. What’s the US equivalent for the Russian Ural or Kamaz trucks?
T-34, which was superior to most German tanks like pzkpfw 3/4 when it was introduced, was produced in vast numbers, around 80000. German designed a competitive tank with the Panther, but only about 6000 were made, and they were beset by reliability problems.
Add in the production by the Western allies, such as 50000 Sherman tanks, the surprising thing is that Nazi Germany didn't collapse faster.
Don't know about modern hardware. Certainly Soviet hardware has a reputation for reliability in adverse conditions. OTOH the first Gulf war was a pretty damning indictment of the warfighting ability of Soviet armour.
In such an environment where all tanks are able to reliably hit and penetrate all others, numbers become the dominant factor.
In more open country, tank armour and punching power make more of a difference.
That's a solid bet. The US has not engaged a similarly sophisticated opponent in generations and with high unit costs of American weapons, any such war would be extraordinarily costly.