The remnant of the first world war generation are 98 years old, not many of them are left.
'However, let this one fact not be escaping YOUR notice, beloved ones, that one day is with Jehovah as a thousand years and a thousand years as one day.  Jehovah is not slow respecting his promise, as some people consider slowness, but he is patient with YOU because he does not desire any to be destroyed but desires all to attain to repentance.  Yet Jehovah’s day will come as a thief, in which the heavens will pass away with a hissing noise, but the elements being intensely hot will be dissolved, and earth and the works in it will be discovered." 2Pe3:8

When Satan's global military industrial complex implodes, it will come down over night.