During Second World War and Occupation of Poland ( 1939 – 1945 ) Krzywicka had to remain in hiding under a false name because she was placed on the Nazi list of people for extermination . She helped Armia Krajowa ( Home Army ) in resistance . Three of her close ones perished during the war : her husband ( probably murdered in Katyn massacre ) , lover ( murdered in Lviv ) , and son Piotr
Katyn massacre
Katyn massacre
Irena Krzywicka