Hauptsturmführer was a Nazi party paramilitary rank that was used in several Nazi organizations such as the SS, NSKK and the NSFK. The rank of Hauptsturmführer was a mid-grade company level officer and was the equivalent of a captain (Hauptmann) in the German Army (Heer) and also the equivalent of captain in foreign armies.Hauptsturmführer was the most commonly held SS officer rank during the Second World War.^{[citation needed]}

The rank of Hauptsturmführer evolved from the much older rank of Sturmhauptführer, created in 1928 as a rank of the Sturmabteilung (SA). The SS used the rank of Sturmhauptführer from 1930 to 1934 at which time, following the Night of the Long Knives, the name of the rank was changed to Hauptsturmführer although the insignia remained the same.

Some of the most infamous SS members are known to have held the rank of Hauptsturmführer. Among them are Josef Mengele, the infamous doctor assigned to Auschwitz; Klaus Barbie, Gestapo Chief of Lyon; Alois Brunner, Adolf Eichmann's assistant; and Amon Göth, who was sentenced to death and hanged for committing mass murder during the liquidations of the ghettos at Tarnow and Krakow, the camp at Szebnie and the Plaszow camp, portrayed in the film Schindler's List.

Michael Wittmann (April 22, 1914 – August 8, 1944) was a German Waffen-SS tank commander during the Second World War. Wittmann would rise to the rank of SS-Hauptsturmführer (captain) and was a Knight's Cross of the Iron Cross holder.

He was credited with the destruction of 138 tanks and 132 anti-tank guns, along with an unknown number of other armoured vehicles, making him one of Germany's top scoring panzer aces, together with Johannes Bölter, Ernst Barkmann, Otto Carius and Kurt Knispel who was the top scoring ace of the war with 168 tank kills.

Wittmann is most famous for his ambush of elements of the British 7th Armoured Division, during the Battle of Villers-Bocage on 13 June 1944. While in command of a single Panzerkampfwagen VI Tiger he destroyed up to 14 tanks and 15 personnel carriers along with 2 anti-tank guns within the space of 15 minutes.

The circumstances behind Wittmann’s death have caused some debate and discussion over the years, but it had been historically accepted that Trooper Joe Ekins, the gunner in a Sherman Firefly of the 1st Northamptonshire Yeomanry, fired the fatal shot. However, in recent years, some historians have suggested that members of the Canadian Sherbrooke Fusiliers Regiment may have been responsible instead.

Erich Priebke (born July 29, 1913) is a former Hauptsturmführer (Captain) in the Waffen SS. In 1996 he was convicted of war crimes in Italy, for participating in the massacre at the Ardeatine caves in Rome, on March 24, 1944. 335 Italian civilians were killed there in retaliation after a partisan attack had claimed the lives of 33 German soldiers (an SS military police battalion from South Tyrol). Priebke was one of those who was held responsible for this mass execution. After the defeat of Nazi Germany, he got help to flee to Argentina where he lived for over 50 years.

In 1991, Priebke's participation in the Rome massacre was denounced in Esteban Buch's book. In 1994, 50 years after the massacre, Priebke felt he could now talk about the incident and was interviewed by an American ABC News reporter Sam Donaldson. This caused outrage among people who had not forgotten the incident, and led to his extradition to Italy and a trial which would last more than four years.

The massacre of Fosse Ardeatine took place in Italy during World War II. On 23 March 1944, 33 German soldiers (members of an SS military police battalion from South Tyrol) were killed when members of the Italian Resistance set off a bomb close to their column, and attacked the soldiers with firearms and grenades while they were marching along Via Rasella, in Rome. This attack was led by the GAP Gruppi di Azione Partigiana.

Adolf Hitler (German: [ˈadɔlf ˈhɪtlɐ] ( listen); 20 April 1889 – 30 April 1945) was an Austrian-born German politician and the leader of the National Socialist German Workers Party (German: Nationalsozialistische Deutsche Arbeiterpartei (NSDAP), commonly referred to as the Nazi Party). He was chancellor of Germany from 1933 to 1945 and dictator of Nazi Germany (as Führer und Reichskanzler) from 1934 to 1945. Hitler is commonly associated with the rise of fascism in Europe, World War II, and the Holocaust.

A decorated veteran of World War I, Hitler joined the German Workers' Party, precursor of the Nazi Party, in 1919, and became leader of the NSDAP in 1921. In 1923, he attempted a coup d'état, known as the Beer Hall Putsch, in Munich. The failed coup resulted in Hitler's imprisonment, during which time he wrote his memoir, Mein Kampf (My Struggle). After his release in 1924, Hitler gained popular support by attacking the Treaty of Versailles and promoting Pan-Germanism, antisemitism, and anticommunism with charismatic oratory and Nazi propaganda. After his appointment as chancellor in 1933, he transformed the Weimar Republic into the Third Reich, a single-party dictatorship based on the totalitarian and autocratic ideology of Nazism. His aim was to establish a New Order of absolute Nazi German hegemony in continental Europe.