March 1 is National Day of Remembrance "Soldiers accursed".
"The cursed soldiers (that is, "accursed soldiers" or "damned soldiers"; Polish: Żołnierze wyklęci) is a name applied to a variety of Polish resistance movements formed in the later stages of World War II and afterwards. Created by some members of the Polish Secret State, these clandestine organizations continued their armed struggle against the Stalinist government of Poland well into the 1950s. The guerrilla warfare included an array of military attacks launched against the new communist prisons as well as MBP state security offices, detention facilities for political prisoners, and concentration camps set up across the country. Most of the Polish anti-communist groups ceased to exist in the late 1940s or 1950s, hunted down by MBP security services and NKVD assassination squads. However, the last known 'cursed soldier', Józef Franczak, was killed in an ambush as late as 1963, almost 20 years after the Soviet take-over of Poland." by Wikipedia [link]