In my headcanon when I wrote this the USA collapsed in 89 instead of the USSR, so by the 2020s we've had thirty years of socialist development without the threat of capitalist encirclement forcing us to maintain a massive military. The Soviet and Chinese governments similarly have been able to disarm as fewer global conflicts have gone hot each decade, refocusing economic goals towards completing green projects and improving living conditions.
Also the USSA doesn't reach the same borders as the current USA, it's just the largest of a series of successor states including indigenous states in the southwest/hawaii/alaska.
In my headcanon when I wrote this the USA collapsed in 89 instead of the USSR, so by the 2020s we've had thirty years of socialist development without the threat of capitalist encirclement forcing us to maintain a massive military. The Soviet and Chinese governments similarly have been able to disarm as fewer global conflicts have gone hot each decade, refocusing economic goals towards completing green projects and improving living conditions.
Also the USSA doesn't reach the same borders as the current USA, it's just the largest of a series of successor states including indigenous states in the southwest/hawaii/alaska.