In World War II, the Polish armed forces were the fourth largest Allied forces in Europe, after those of the Soviet Union, United States, and Britain. Poles made substantial contributions to the Allied effort throughout the war, fighting on land, sea, and in the air.
The Home Army was the dominant resistance movement in German-occupied Poland during World War II. The Home Army was formed in February 1942 from the earlier Związek Walki Zbrojnej established in the aftermath of the German and Soviet invasions in September 1939. Over the next two years, the Home Army absorbed most of the other Polish partisans and underground forces. Its allegiance was to the Polish government-in-exile in London, and it constituted the armed wing of what came to be known as the Polish Underground State. Estimates of the Home Army's 1944 strength range between 200,000 and 600,000. The latter number made the Home Army not only Poland's largest underground resistance movement but, along with Soviet and Yugoslav partisans, one of Europe's largest World War II underground movements.
The Invasion of Poland, also known as the September Campaign, Polish Campaign, War of Poland of 1939, and Polish Defensive War of 1939, was a joint attack on the Republic of Poland by Nazi Germany, the Slovak Republic, and the Soviet Union; which marked the beginning of World War II. The German invasion began on 1 September 1939, one week after the signing of the Molotov–Ribbentrop Pact between Germany and the Soviet Union, and one day after the Supreme Soviet of the Soviet Union had approved the pact. The Soviets invaded Poland on 17 September. The campaign ended on 6 October with Germany and the Soviet Union dividing and annexing the whole of Poland under the terms of the German–Soviet Frontier Treaty. The invasion is also known in Poland as the September campaign or 1939 defensive war and known in Germany as the Poland campaign.
Special operations or spec ops are military activities conducted, according to NATO, by "specially designated, organized, selected, trained, and equipped forces using unconventional techniques and modes of employment." Special operations may include reconnaissance, unconventional warfare, and counterterrorism, and are typically conducted by small groups of highly trained personnel, emphasizing sufficiency, stealth, speed, and tactical coordination, commonly known as special forces.
The massacres of Poles in Volhynia and Eastern Galicia were carried out in German-occupied Poland by the Ukrainian Insurgent Army (UPA) with the support of parts of the local Ukrainian population against the Polish minority in Volhynia, Eastern Galicia, parts of Polesia and the Lublin region from 1943 to 1945. The ruling Germans also actively encouraged both Ukrainians and Poles to kill each other.
The Warsaw Ghetto Uprising was the 1943 act of Jewish resistance in the Warsaw Ghetto in German-occupied Poland during World War II to oppose Nazi Germany's final effort to transport the remaining ghetto population to the gas chambers of the Majdanek and Treblinka extermination camps.
Łapanka ( ) was the Polish name for a World War II practice in German-occupied Poland, whereby the German SS, Wehrmacht and Gestapo rounded up civilians on the streets of Polish cities. The civilians arrested were in most cases chosen at random from among passers-by or inhabitants of city quarters surrounded by German forces prior to the action.
The Ukrainian Insurgent Army was a Ukrainian nationalist paramilitary and partisan formation founded by the Organisation of Ukrainian Nationalists on October 14, 1942. During World War II, it was engaged in guerrilla warfare against the Soviet Union, Nazi Germany and both the Polish Underground State and Communist Poland.
Gwardia Ludowa or GL was a communist underground armed organization created by the communist Polish Workers' Party in German-occupied Poland, with sponsorship from the Soviet Union. Formed in early 1942, within a short time Gwardia Ludowa became the largest clandestine fighting force on Polish soil which refused to join the structures of the Polish Underground State loyal to the London-based government-in-exile. In the January 1 of 1944 GL was incorporated into the communist Armia Ludowa.
"Grey Ranks" was a codename for the underground paramilitary Polish Scouting Association during World War II.
The 3rd SS Panzer Division "Totenkopf" was an elite division of the Waffen-SS of Nazi Germany during World War II, formed from the Standarten of the SS-TV. Its name, Totenkopf, is German for "death's head" – the skull and crossbones symbol – and it is thus sometimes referred to as the Death's Head Division.
The Dirlewanger Brigade, also known as the SS-Sturmbrigade Dirlewanger (1944), or the 36th Waffen Grenadier Division of the SS, or The Black Hunters, was a unit of the Waffen-SS during World War II. The unit, named after its commander Oskar Dirlewanger, consisted of convicted criminals who were not expected to survive their service with the unit. Originally formed from convicted poachers in 1940 and first deployed for counter-insurgency duties against the Polish resistance movement, the brigade saw service in anti-partisan actions in German-occupied Eastern Europe.
During World War II, resistance movements operated in German-occupied Europe by a variety of means, ranging from non-cooperation to propaganda, hiding crashed pilots and even to outright warfare and the recapturing of towns. In many countries, resistance movements were sometimes also referred to as The Underground.
Jewish resistance under Nazi rule took various forms of organized underground activities conducted against German occupation regimes in Europe by Jews during World War II. According to historian Yehuda Bauer, Jewish resistance was defined as actions that were taken against all laws and actions acted by Germans. The term is particularly connected with the Holocaust and includes a multitude of different social responses by those oppressed, as well as both passive and armed resistance conducted by Jews themselves.
In Poland, the resistance movement during World War II was led by the Home Army. The Polish resistance is notable among others for disrupting German supply lines to the Eastern Front, and providing intelligence reports to the British intelligence agencies. It was a part of the Polish Underground State.
Union of Retaliation was a Polish World War II resistance organization established on 20 April 1940. It was created by General Stefan Rowecki, head of the Armed Resistance, as that organization's branch dedicated to sabotage and covert operations.
Special forces or special operations forces (SOF) are military units trained to conduct special operations. NATO has defined special operations as "military activities conducted by specially designated, organized, selected, trained and equipped forces using unconventional techniques and modes of employment".
The Pacification of Ukrainians in Eastern Galicia was a punitive action against the Ukrainian minority in Poland, carried out by police and military of the Second Polish Republic from September until November 1930 in reaction to a wave of sabotage and terrorist attacks perpetrated by Ukrainian nationalists.
Bloody Wednesday refers to the events of 15 August 1906 in the (Congress) Kingdom of Poland, where the Combat Organization of the Polish Socialist Party carried out a series of attacks on Russians, primarily police officers and informants. This took place in the context of the Revolution in the Kingdom of Poland (1905–1907), and represented one of the biggest actions in the history of OB PPS.
Railway sabotage was one of the main tactics used by the resistance to German occupation during World War II. Partisans and rail workers used sabotage to harass and confuse the invaders, misdirect, destroy, and lose their troops and supplies, and to damage railroad infrastructure, denying the occupiers its use.
