As long as the weapons are maintained and other components are cycled out including the Tritium, they're fine. https://www.quora.com/Do-nuclear-weapons-degrade-over-time-and-eventually-become-unusable

I have seen a lot of similarities between the 1920's to 1930's and the past decade. Things can change in a matter of weeks and months. I see a more unified World than back then, though.