Did Patton have enough winter gear? German army was defeated in Russia by the brutal winter. With 12 time zones, Russia is very hard to conquer. Japan is designed to be nuked with highly dense population. USA could not defeat North Vietnam, Afghanistan and made a disastrous blunder to take out Sadam who was keeping Iran under control and there was no ISIS under Sadam.
The key to conquering or defeating Russia has always been Moscow. That’s a critical flaw of the gross centralization practiced in Russia.
In 1945 all phone calls went through Moscow. Obliterating that city would disrupt Soviet command and control.
Erich von Mannstein wrote of this and so did Winston Churchill.