Huat Zai

The Soviets had OTH radar since the 50s, nothing lift-offs without them knowing. Problem is tracking the plane under 1000 km to intercept. A couple of hard turns under 1000 km and the Soviets had to scramble whole bases to find the damn plane

There are already a number of ways stealth planes are being detected now, the catch is sorting out the signal of a stealth plane from the countless signals in the skies. That's why AI is more important now, a geometric model can pick up enemy geometric pattern in a faction of a second, whereas a human team might miss it totally.

Self-driving drones, explosive batteries, inter-ballistic launch capacity, global comms and navigation...