the definition of the word tankie is like a rubber band that broke long ago from being overstretched, and has now become brittle from sitting in the sun. It used to be an infighting word in the Communist Party of Great Britain in the 1950s. CPGB members would accuse each other of being tankie if they towed the CPSU party line, particularly in regards to the USSR's actions against the (US-backed) Hungarian uprising.
Now it's just a term liberals use when you tell them to read Capital. Marx? A tankie? Tanks didn't even exist until after he died lol.
hmmm... Tachanka is just a maxim gun mounted on a horse cart. Maxim gun came from 1884 and Marx died in 1883. So nope. Tachankas didn't exist until after Marx died either. Ergo no Tachankies.