The annexation if cieszyn in 1938 was a follow up.to
1920. In 1918 both apoland and Czechów were reborn. The duchy of cieczyn on the border between the two with an ethnically mixed population was a point of dispute. The locals were sensible and set up a joint governing area. But the czech govt took over the entire land. Poland grabbed it back in 1938 in a.silly move. But recently both sides.have agreed to the earlier, local, sensible agreement. Also the 1968 move was under.the Warsaw pact, another stupid move but pushed by the Kremlin. That move had the effect of galvanising the anti communist movement in poland that took a lead 14 years later and was instrumental in the collapse of the Soviet bloc
Gomulka was an evil man. In 1968, he also expelled most of Poland’s remaining Jews.
It’s a story not often told, but Irena Sendler, who was censored by the Communists, even proclaimed she would once again shelter Jews if the Polish Communists wouldn’t let up their anti-Jewish policies.