Ante Pavelić in the context of "6 January Dictatorship"

The Independent State of Croatia (Croatian: Nezavisna Država Hrvatska, NDH) was a World War II–era quasi-protectorate of Fascist Italy (1941–1943) and puppet state of Nazi Germany (1941–1945). It was established in parts of occupied Yugoslavia on 10 April 1941, after the invasion by the Axis powers. Its territory consisted mostly of modern-day Croatia and Bosnia and Herzegovina, as well as some parts of modern-day Serbia and Slovenia, but also excluded many Croat-populated areas in Dalmatia (until late 1943), Istria, and Međimurje regions (which today are part of Croatia).

During its entire existence, the NDH was governed as a one-party state by the fascist Ustaše organization. The Ustaše was led by its Poglavnik, Ante Pavelić. The regime targeted Serbs, Jews and Roma as part of a large-scale campaign of genocide, as well as anti-fascist or dissident Croats and Bosnian Muslims. According to Stanley G. Payne, "crimes in the NDH were proportionately surpassed only by Nazi Germany, the Khmer Rouge in Cambodia and several of the extremely genocidal African regimes." In the territory controlled by the NDH, between 1941 and 1945, there existed 22 concentration camps. The largest camp was Jasenovac. Two camps, Jastrebarsko and Sisak, held only children.

Poglavnik (Croatian: [pǒɡlaːʋniːk]) is a Croatian word meaning 'leader' or 'guide'.

As a political title, it is strongly associated with Ante Pavelić, head of the fascist organization known as the Ustaše in 1929 and served as dictator of the Independent State of Croatia, a World War II fascist puppet state built out of parts of Axis occupied Yugoslavia by the authorities of Nazi Germany and Fascist Italy, between 1941 and 1945.

The Genocide of Serbs in the Independent State of Croatia (Serbo-Croatian: Genocid nad Srbima u Nezavisnoj Državi Hrvatskoj / Геноцид над Србима у Независној Држави Хрватској) was the systematic persecution and extermination of Serbs committed during World War II by the fascist Ustaše regime in the Nazi German puppet state known as the Independent State of Croatia (Serbo-Croatian: Nezavisna Država Hrvatska / Независна Држава Хрватска, NDH) between 1941 and 1945. It was carried out through executions in death camps, as well as through mass murder, ethnic cleansing, deportations, forced conversions, and war rape. This genocide was simultaneously carried out with the Holocaust in the NDH as well as the genocide of Roma, by combining Nazi racial policies with the ultimate goal of creating an ethnically pure Greater Croatia.

The ideological foundation of the Ustaše movement reaches back to the 19th century. Several Croatian nationalists and intellectuals established theories about Serbs as an inferior race. The World War I legacy, as well as the opposition of a group of nationalists to the unification into a common state of South Slavs, influenced ethnic tensions in the newly formed Kingdom of Serbs, Croats and Slovenes (since 1929 Kingdom of Yugoslavia). The 6 January Dictatorship and the later anti-Croat policies of the Serb-dominated Yugoslav government in the 1920s and 1930s fueled the rise of nationalist and far-right movements. This culminated in the rise of the Ustaše, an ultranationalist, terrorist organization, founded by Ante Pavelić. The movement was financially and ideologically supported by Benito Mussolini, and it was also involved in the assassination of King Alexander I.

The Croatian Orthodox Church (Croatian: Hrvatska pravoslavna crkva) was a religious body created during World War II by the Fascist Ustaše regime in the Independent State of Croatia (NDH). It was created in order to assimilate the remaining Serb minority and also to unite other Orthodox communities into a state-based Eastern Orthodox Church.

In 1942, NDH authorities finally made a move to organize a domestic Orthodox Church. This was part of a policy to eliminate Serb culture from Axis Croatia. The church lasted from 1942–45, and was intended to serve as a national church to which Serbs living in Croatia would convert, thus making it possible to describe them as "Croats of Eastern Orthodox faith". The Croatian Orthodox Church was managed by Montenegrin nationalist Savić Marković Štedimlija. There were some discussions during the 1990s, after the breakup of Yugoslavia, regarding the revival of such a church.

The Croatian Armed Forces united the Croatian Home Guard and the Ustaše Militia in the Independent State of Croatia (NDH) for around five months from 1944 to 1945. It was established by the fascist Ustaše regime of Ante Pavelić in the NDH an Axis puppet state in Yugoslavia during World War II.

The Croatian Armed Forces was reorganized in November 1944 to combine the units of the Ustaše and Domobrani into eighteen divisions, comprising 13 infantry, two mountain, two assault and one replacement Croatian divisions, each with its own organic artillery and other support units. There were also several armoured units, equipped in late 1944 with 20 Panzer IIIN and 15 Panzer IVF and H medium tanks. From early 1945, the Croatian divisions were allocated to various German corps and by March 1945 were holding the Southern Front. Securing the rear areas were some 32,000 men of the Croatian Gendarmerie, organised into 5 Police Volunteer Regiments plus 15 independent battalions, equipped with standard light infantry weapons, including mortars.