https://en.wikipedia.org/wiki/Sino-Soviet_border_conflictThe best part is the horses with gas masks on while the PLA cavalry charges with sabers against a nuclear attack. Good luck with that one, boys!
(On a serious note, China was just as afraid of the USSR at that time as we were. The longest nuclear-armed border was China and the Soviet Union and my Russian pals tell me their bomb shelter drills were the result of China nuke fears as well as attacks from the West. Yes, the Russian kids also knew the famed "put your head between your legs and kiss your a... goodbye" bomb drill but in Russian. )