Russia will have unexpected gains in Ukraine and US will decide to directly intervene using armies from Poland, Baltic states, Romania, Slovakia, Czechia, starting the WW3, escalating beyond all prior limits rapidly. EU will get completely nuked within a day, destroying all cities above 100k, leaving only pockets of rural areas survivable. UK and Ireland will be swept by a massive tsunami from a nuke detonated underw…
Most of the rest end up being destroyed by already established anti-missile defenses.
Starlink ends up being a missile defense in disguise and Musk ends up being hailed as savior of some US cities after sattelites do kinetic intercepts of a lot of missiles entering space. (even though it would probably be a us dod takeover of the the sattelites)
Putin and company gets gaddafi treatment.
Russia promptly unconditionally surrenders after NATO campaign and nuclear retaliation threats or actual detonations based on how many they got through.