Aspect of war fighting
In German military history, (lit. '"bandit-fighting" or "combating of bandits"; English equivalent of "anti-partisan operations"'), also referred to as Nazi security warfare during World War II, refers to the concept and military doctrine of countering resistance or insurrection in the rear area during wartime with extreme brutality. The doctrine provided a rationale for disregarding the established laws of war and for targeting any number of groups, from armed guerrillas to civilians, as "bandits" or "members of gangs". As applied by the German Empire and later Nazi Germany, it became instrumental in the crimes against humanity committed by the two regimes, including the Herero and Nama genocide and the Holocaust.
Historian Alex J. Kay estimates that around one million civilians may have died as a result of German anti-partisan warfare—excluding actual partisans—among the 13 to 14 million people murdered by the Nazis during World War II.
Background.
According to historian and television documentary producer, Christopher Hale, there are indications that the term "Bandenbekämpfung" may go back as far as the Thirty Years' War. Under the German Empire established by Otto von Bismarck in 1871 after the Franco-Prussian War—formed as a union of twenty-five German states under the Hohenzollern king of Prussia—Prussian militarism flourished; martial traditions that included the military doctrine of Antoine-Henri Jomini's 1837 treatise, "Summary of the Art of War", were put into effect. Some of the theories laid out by Jomini contained instructions for intense offensive operations and the necessity of securing one's "lines of operations". German military officers took this to mean as much attention should be given to logistical operations used to fight the war at the rear as those in the front, and certainly entailed security operations. Following Jomini's lead, "Oberstleutnant" Albrecht von Boguslawski published lectures entitled "Der Kleine Krieg" ("The Small War", a literal translation of "guerrilla"), which outlined in detail the tactical procedures related to partisan and anti-partisan warfare—likely deliberately written without clear distinctions between combatants and non-combatants. To what extent this contributed to the intensification of unrestrained warfare cannot be known, but Prussian officers like Alfred von Schlieffen encouraged their professional soldiers to embrace a dictum advocating that "for every problem, there was a military solution". Helmuth von Moltke the Elder, Chief of the Prussian General Staff, added hostage-taking as a means of deterrence to sabotage activities and the employment of collective measures against entire communities, which became the basis for German anti-partisan policies from 1870 and remained as such through 1945.
Franco-Prussian War.
Prussian security operations during the Franco-Prussian War included the use of "Landwehr" reservists, whose duties ranged from guarding railroad lines, to taking hostages, and carrying out reprisals to deter activities of "francs-tireurs". Bismarck wanted all "francs-tireurs" hanged or shot, and encouraged his military commanders to burn down villages that housed them. More formal structures like Chief of the Field Railway, a Military Railway Corps, District Commanders, Special Military Courts, intelligence units, and military police of varying duties and nomenclature were integrated into the Prussian system to bolster security operations all along the military's operational lines.
Boxer Rebellion and Herero Wars.
Operationally, the first attempts to use tactics that would later develop into "Bandenbekämpfung" or be recognised as such were carried out in China in the wake of the Boxer Rebellion (1899–1901), after two German officers went missing, which was followed up with more than fifty operations by German troops, who set fire to a village and held prisoners. Shortly after these operations, the infantry was provided with a handbook for "operations against Chinese bandits" ("Banden"). The first full application of "Bandenbekämpfung" in practice, was the Herero and Nama genocide (1904–08), a campaign of racial extermination and collective punishment that the German Empire undertook in German South West Africa (modern-day Namibia) against the Herero and Nama people.
World War I.
During World War I, the Imperial German Army ignored many of the commonly-understood European conventions of war when between August and October 1914, some 6,500 French and Belgian citizens were murdered. On some occasions, attacks against German infantry positions and patrols that may have actually been attributable to "friendly fire" were blamed on potential "francs-tireurs", who were regarded as bandits and outside the rules of war, eliciting ruthless measures by German forces against civilians and villages suspected of harboring them. 
Throughout the war, Germany's integrated intelligence, perimeter police, guard network, and border control measures coalesced to define the German military's security operations. Along the Eastern Front sometime in August 1915, Field Marshal Erich von Falkenhayn established the Government General of Warsaw over former Congress Poland under General Hans von Beseler and created an infrastructure to support ongoing military operations, including guard posts, patrols, and a security network. Maintaining security meant dealing with Russian prisoners, many of whom tried to sabotage German plans and kill German soldiers, so harsh pacification measures and terror actions were carried out, including brutal reprisals against civilians, who were subsequently labeled as bandits. Before long, similar practices were instituted throughout the Eastern and Western areas of German occupied territory.
World War II.
During World War II, the German Army policy for deterring partisan or "bandit" activities against its forces was to strike "such terror into the population that it loses all will to resist". Even before the Nazi campaign in the East began, Adolf Hitler had already absolved his soldiers and police from any responsibility for brutality against civilians, expecting them to kill anyone that even "looked askance" at the German forces. Much of the partisan warfare became an exercise of antisemitism, as military commanders like General Anton von Mauchenheim gennant Bechtolsheim exclaimed that whenever an act of sabotage was committed and one killed the Jews from that village, then "one can be certain that one has destroyed the perpetrators, or at least those who stood behind them". Commander of "Einsatzgruppe B", Arthur Nebe, expressed a similar opinion when he commented: "Where there’s a partisan, there’s a Jew, and where there’s a Jew, there’s a partisan."
Following the Nazi invasion of Poland in 1939 and its reorganisation, security and policing merged with the establishment of "Bandenbekämpfung" operations. Aside from the groups assigned to fight partisans, additional manpower was provided by the Gestapo, the Kripo (criminal police), the SD, and the "Waffen-SS". There were a number of SS-led actions implemented against so–called "partisans" in Lemberg, Warsaw, Lublin, Kovel, and other places across Poland. 
When the "Wehrmacht" entered Serbia in 1941, they carried out mass reprisals against alleged "partisans" by executing Jews there. The commander responsible for combating partisan warfare in 1941, General Franz Böhme, reiterated to the German forces, "that rivers of German blood" had been spilled in Serbia during the First World War and the "Wehrmacht" should consider any acts of violence there as "avenging these deaths". 
During the Battle of Crete (May 1941), German paratroopers encountered widespread resistance from the civilian population. This resistance outraged General Kurt Student, commander of the XI Air Corps, who ordered "revenge operations," consisting of: "1) shootings; 2) forced levies; 3) burning down villages; and 4) extermination of the male population of the entire region". General Student also demanded that "all operations be carried out with great speed, leaving aside all formalities and certainly dispensing with special courts". This contributed to a series of collective punishments against civilians in Kandanos, Kondomari, and Alikianos, immediately after Crete fell. During the Axis occupation of Greece, the emergence of armed resistance from 1942 onward invoked mass reprisals in places such as Viannos, Kedros, Mousiotitsa, Kommeno, Lingiades, Kalavryta, Drakeia, Distomo, Mesovouno, Pyrgoi, Kaisariani and Chortiatis, along with numerous other incidents of smaller scale. Generals whose units also committed war crimes under the guise of "Bandenbekämpfung" included Walter Stettner, commander of the 1st Mountain Division in Epirus, and Friedrich-Wilhelm Müller, who led the 22nd Air Landing Division in Crete.
Before invading the Soviet Union for Operation Barbarossa, "Reichsführer-SS" Heinrich Himmler, and Chief of the SD Reinhard Heydrich, as well as SS General Heinrich Müller briefed the "Einsatzgruppen" leaders of their responsibility to secure the rear areas—using the euphemism "special treatment"—against potential enemies; this included partisans and anyone deemed a threat by the Nazi functionaries. When Heydrich repeated this directive as an operational order ("Einsatzbefehl"), he stressed that this also meant functionaries of the Comintern, Jews, and anyone of position in the communist party. This was part of the SS contribution to prevent crime in the newly conquered territories, to maintain order, and to ensure the efficient establishment of miniature Nazi governments, constituted by mobile versions of the Reich Security Main Office.
Starting the same day Germany invaded the Soviet Union (22 June 1941), the 12th Infantry Division command issued orders that guerilla warfare combatants were not to be quartered as POWs but were to be "sentenced on the spot by an officer", meaning they were to be summarily shot. To this end, the Nazis welcomed partisan warfare since in the mind of Hitler, such circumstances opened up "the possibility of annihilating all opposition". 
On 31 July 1941, the 16th Army command were informed that any "Partisan-Battalions" formed behind the front that were not properly uniformed and without appropriate means of identification, "were to be treated as guerrillas, whether they were soldiers or not". Any civilians who provided any assistance whatsoever were to be treated likewise, which historian Omer Bartov claims "always meant one thing only: death by shooting or hanging". Members of the 18th Panzer Division were instructed likewise on 4 August 1941. Nearly always, these genocidal measures were "camouflaged" in reports by coded formalised language, using terms like "Aktion", "Sonderbehandlung" (special handling), or "Umsiedlung" (relocated). 
From September 1941 onwards through the course of World War II, the term "Bandenbekämpfung" supplanted "Partisanenkämpfung" (anti-partisan warfare) to become the guiding principle of Nazi Germany's security warfare and occupational policies; largely as a result of Himmler's insistence that for psychological reasons, bandit was somehow preferable. Himmler charged the "Prinz Eugen" Division to expressly deal with "partisan revolts". Units like the SS Galizien—who were likewise tasked to deal with partisans—included foreign recruits overseen by experienced German "bandit" fighters well-versed in the "mass murder of unarmed civilians". 
In keeping with these extreme measures, the OKW issued orders on 13 September 1941, that "Russian soldiers who had been overrun by the German forces and had then reorganised behind the front were to be treated as partisans—that is, to be shot. It was left to the commanders on the spot to decide who belonged to this category." On 23 October 1942, Himmler named SS General Erich von dem Bach-Zelewski the "Commissioner for Anti-Bandit Warfare." Then Himmler transferred SS General Curt von Gottberg to Belorussia to ensure that the "Bandenbekämpfung" operations were conducted on a permanent basis, a task which Gottberg carried out with fanatical ruthlessness, declaring the entire population bandits, Jews, Gypsies, spies, or bandit sympathisers. During Gottberg's first major operations, Operations Nürnberg and Hamburg, conducted between November through December 1942, he reported 5,000 murdered Jews, another 5,000 bandits or suspects eliminated, and 30 villages burned down.
Also in October 1942—just a couple months prior to Gottberg's exploits—"Reichsmarschall" Hermann Göring had ordered "anti-bandit warfare" in Army Group Rear Area Centre, which was shortly followed by an OKH Directive on 11 November 1942 for "anti-bandit warfare in the East" that announced sentimental considerations as "irresponsible" and instructed the men to shoot or preferably hang bandits, including women. Misgivings from commanders within Army Group Rear that such operations were counterproductive and in poor taste, since women and children were also being murdered, went ignored or resisted from Bach-Zelewski, who frequently "cited the special powers of the "Reichsführer"." During late November 1942, forty-one "Polish-Jewish bandits" were killed in the forest area of Lubionia, which included "reprisals" against villages in the area. Another action undertaken under the auspices of anti-bandit operations occurred near Lublin in early November 1943; named "Aktion Erntefest" (Action Harvest Festival), SS-Police, and "Waffen-SS" units, accompanied by members of the Lublin police, rounded up and killed 42,000 Jews. 
Over time, the "Wehrmacht" acculturated to the large scale anti-bandit operations, as they too came to see the entire population as criminal and complicit in any operation against German troops. Many German Army commanders were unbothered by the fact that these operations fell under the jurisdiction of the SS. Historians Ben Shepherd and Juliette Pattinson note:
As the war dragged on, the occupation's mounting economic rapacity engendered a vicious cycle of further resistance, further German brutality in