How similar were events in Hungary in 1956 and in Czechoslovakia in 1968?

Both of these events covered the same basic outline; a revolt, reforms in the country and the USSR's reaction to these modifications.

The Cleveland Massacre was a three-month conflict between the Standard Oil Company and the oil refineries of Cleveland over the authority of the oil fields. The conflict took place in 1872 and within six months the Standard Oil was able to acquire 22 out of 26 oil refineries at a very lower rate. Hope this helps!