It was on September 27–29, 1939 that the Polish government escaped into exile via Romania. Germany and the Soviet Union divide Poland between them.
The Polish army and citizens were brave but were only able to withhold both enemies for 26 days. Once Germans saw the victory, they began a program to instill terror to the people called “Extraordinary Pacification Action", which was made up by murdering people in cruel ways, executing people in broad daylight in front of others (mainly executing middle to upper class people).
The Roman Catholic Church, too, was targeted, because it was a possible source of dissent and counterinsurgency. In one west Poland church diocese alone, 214 priests were shot. And hundreds of thousands more Poles were driven from their homes and relocated east, as Germans settled in the vacated areas.