Many individuals and groups in Germany that were opposed to the Nazi regime engaged in resistance, including assassination attempts on Adolf Hitler or by overthrowing his regime.German resistance was not recognized as a united resistance movement during the height of Nazi Germany, unlike the more organised efforts in other countries, such as Italy, Denmark, the Soviet Union, Poland, Greece, Yugoslavia, France, the Netherlands, Czechoslovakia, and Norway. The German resistance consisted of small, isolated groups that were unable to mobilize mass political opposition. Individual attacks on Nazi authority, sabotage, and the disclosure of information regarding Nazi armaments factories to the Allies, as by the Austrian resistance group led by Heinrich Maier, occurred. One strategy was to persuade leaders of the Wehrmacht to stage a coup d'état against the regime; the 20 July plot of 1944 against Hitler was intended to trigger such a coup.It has been estimated that during the course of World War II 800,000 Germans were arrested by the Gestapo for resistance activities. It has also been estimated that between 15,000 and 77,000 of the Germans were executed by the Nazis. Resistance members were usually tried, mostly in show trials, by Sondergerichte (Special Courts), courts-martial, People's Courts, and the civil justice system. Many of the Germans had served in government, the military, or in civil positions, which enabled them to engage in subversion and conspiracy. The Canadian historian Peter Hoffmann counts unspecified "tens of thousands" in Nazi concentration camps who were either suspected of or engaged in opposition. The German historian Hans Mommsen wrote that resistance in Germany was "resistance without the people" and that the number of those Germans engaged in resistance to the Nazi regime was very small. The resistance in Germany included members of the Polish minority who formed resistance groups like Olimp. Source: Wikipedia (en)