Polish Army in the context of "Warsaw Uprising (1794)"

Independent Operational Group Silesia (Polish: Samodzielna Grupa Operacyjna Śląsk, SGO Śląsk) was an Operational Group of the Polish Army, created in September 1938 to annex Trans-Olza (Zaolzie) from Czechoslovakia.

Plan West (Polish: Plan Zachód) was a military plan of the Polish Army of the Second Polish Republic, for defence against invasion from Nazi Germany. It was designed in the late 1930s.

The siege of Warsaw in 1939 was fought between the Polish Warsaw Army (Polish: Armia Warszawska, Armia Warszawa) garrisoned and entrenched in Warsaw and the invading German Army.

It began with huge aerial bombardments initiated by the Luftwaffe starting on September 1, 1939 following the German invasion of Poland. Land fighting started on September 8, when the first German armored units reached the Wola district and south-western suburbs of the city. Despite German radio broadcasts claiming to have captured Warsaw, the initial German attack was repelled and soon afterwards Warsaw was placed under siege. The siege lasted until September 28, when the Polish garrison, commanded under General Walerian Czuma, officially capitulated. The following day approximately 140,000 Polish troops left the city and were taken as prisoners of war. On October 1 the Wehrmacht entered Warsaw, which started a period of German occupation that lasted until the devastating Warsaw Uprising and later until January 17, 1945, when the Wehrmacht troops abandoned the city due to the advance of Soviet forces.

A bipod is a V-shaped portable attachment that helps support and steady a device, usually a weapon such as a long gun or a mortar. The term comes from the Latin prefix bi- and Greek root pod, meaning "two" and "foot" respectively.

Bipods are designed to support the weight of the weapon's front portion and barrel, and provide significant stability against unwanted side-to-side movements (i.e. canting) while allowing free movements pivoting around the transverse axis (pitching). Most modern bipods have foldable and/or telescoping legs, and allow some limited movements around the vertical axis (panning) and even the longitudinal axis (tilting).

An armoured personnel carrier (APC) is a broad type of armoured military vehicle designed to transport personnel and equipment in combat zones. Since World War I, APCs have become a very common piece of military equipment around the world.

According to the definition in the Treaty on Conventional Armed Forces in Europe, an APC is "an armoured combat vehicle which is designed and equipped to transport a combat infantry squad and which, as a rule, is armed with an integral or organic weapon of less than 20 millimetres calibre." Compared to infantry fighting vehicles (IFVs), which are also used to carry infantry into battle, APCs have less armament and are not designed to provide direct fire support in battle. Infantry units that travel in APCs are known as mechanized infantry. Some militaries also make a distinction between infantry units that use APCs and infantry units that use IFVs, with the latter being known as armoured infantry.

Władysław Bortnowski (12 November 1891 – 21 November 1966) was a Polish historian, military commander and one of the highest ranking generals of the Polish Army. He is most famous for commanding the Pomorze Army in the Battle of the Bzura during the invasion of Poland in 1939. He is also notable for serving as president of the Józef Piłsudski Institute of America between 1961 and 1962.

Operational Group (Polish: Grupa Operacyjna, GO) was the highest level type of tactical division of the Polish Army at various points in the 20th century, mainly during the Second World War.

A front (Russian: фронт, romanized: front) is a type of military formation that originates in the Russian Empire, and has been used by the Polish Army, the Red Army, the Soviet Army, and Turkey. It is roughly equivalent to an army group in the military of most other countries. It varies in size but in general contains three to five armies. It should not be confused with the more general usage of military front, describing a geographic area in wartime.

Żydowski Związek Wojskowy (ŻZW, Polish for Jewish Military Union, Yiddish: יידישע מיליטערישע פֿאראייניקונג, romanized: Yidishe Militerishe Fareynikung) was an underground resistance organization operating during World War II in the area of the Warsaw Ghetto, which fought during the Warsaw Ghetto Uprising and 1944 Warsaw Uprising. It was formed, primarily of former officers of the Polish Army, in late 1939, soon after the start of the German occupation of Poland.

Due to the ŻZW's close ties with the Armia Krajowa (AK), which was closely linked to the Polish Government in Exile, after the war the Soviet-dependent People's Republic of Poland suppressed publication of books and articles on ŻZW. Its role in the uprising in the ghetto was downplayed, in favour of the larger, more socialist Żydowska Organizacja Bojowa (Jewish Fighting Organization).