Untergrundbewegung
Resistance movements can include any irregular armed force that rises up against an enforced or established authority, government, or administration. This frequently includes groups that consider themselves to be resisting tyranny or dictatorship. Some resistance movements are underground organizations engaged in a struggle for national liberation in a country under military occupation or totalitarian domination. Tactics of resistance movements against a constituted authority range from nonviolent resistance and civil disobedience, to guerrilla warfare and terrorism, or even conventional warfare if the resistance movement is strong enough. Any government facing violent acts from a resistance movement usually condemns such acts as terrorism, even when such attacks target only the military or security forces. Resistance during World War II was mainly dedicated to fighting the Axis occupiers. Germany itself also had an anti-Nazi German resistance movement in this period. Although the United Kingdom did not suffer invasion in World War II, preparations were made for a British resistance movement in the event of a German invasion (see Auxiliary Units).