Resistance during World War II

During World War II, resistance movement occurred 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. The resistance movements in World War II can be broken down into two primary politically polarized camps: the internationalist and usually Communist Party-led anti-fascist resistance that existed in nearly every country in the world; and the various nationalist groups in German- or Soviet-occupied countries, such as the Republic of Poland, that opposed both Nazi Germany and the Communists.

Among the most notable resistance movements were Yugoslav Partisans, the Soviet partisans,^[a] the Polish Resistance (including the Polish Home Army, that started the Warsaw Uprising on August 1, 1944, Leśni, and the greater Polish Underground State); the Chinese resistance, the Italian Resistenza (led mainly by the Italian CLN); the Jewish Resistance in various German-occupied territories, the Korean Resistance in the Japan Occupied Korea and the Chinese Zone, the Greek Resistance, the French Resistance, the Belgian Resistance, the Norwegian Resistance, the Danish Resistance, the Czech resistance, the Albanian resistance, the Dutch Resistance (especially the "LO" (national hiding organisation)) and the politically persecuted opposition in Germany itself (there were 16 main resistance groups and at least 27 failed attempts to assassinate Hitler with many more planned).

Many countries had resistance movements dedicated to fighting or undermining the Axis invaders, and Nazi Germany itself also had an anti-Nazi movement. Although Britain was not occupied during the war, the British made complex preparations for a British resistance movement. The main organisation was created by the Secret Intelligence Service (SIS, aka MI6) and is now known as Section VII. In addition there was a short-term secret commando force called the Auxiliary Units. Various organizations were also formed to establish foreign resistance cells or support existing resistance movements, like the British Special Operations Executive and the American Office of Strategic Services (the forerunner of the Central Intelligence Agency).

There were also resistance movements fighting against Allied invaders. In Italian East Africa, after the Italians were defeated during the East African Campaign, some Italian soldiers and settlers participated in a guerrilla war against the Allies from 1941 to 1943. Though the Werwolf Nazi German resistance movement never amounted to much, the German Volkssturm played an extensive role in the Battle of Berlin. The "Forest Brothers" of Estonia, Latvia and Lithuania included many fighters who operated against the Soviet occupation of the Baltic States into the 1960s. During or after the war, similar anti-Soviet resistance rose up in places like Romania, Poland, Bulgaria, Ukraine, and Chechnya.

While historians and governments of some European countries have attempted to portray resistance to Nazi occupation as widespread among their populations, only a small minority of people participated in organized resistance, estimated at one to three percent of the population of countries in western Europe. In eastern Europe where Nazi rule was more oppressive, a larger percentage of people were in organized resistance movements, for example, an estimated 10-15 percent of the Polish population. Passive resistance by non-cooperation with the occupiers was much more common.