Prince Paul of Yugoslavia in the context of "Yugoslavia"

The Yugoslav coup d'état took place on 27 March 1941 in Belgrade, Kingdom of Yugoslavia, when the regency led by Prince Paul of Yugoslavia was overthrown and King Peter II assumed full monarchical powers. The coup was planned and conducted by a group of pro-Western Serbian nationalist Royal Yugoslav Air Force officers formally led by the Air Force commander, General Dušan Simović, who had been associated with several putsch plots from 1938 onwards. Brigadier General of Military Aviation Borivoje Mirković, Major Živan Knežević of the Yugoslav Royal Guards, and his brother Radoje Knežević were the main organisers in the overthrow of the government. In addition to Radoje Knežević, some other civilian leaders were probably aware of the takeover before it was launched and moved to support it once it occurred, but they were not among the organisers. Peter II himself was surprised by the coup, and heard of the declaration of his coming-of-age for the first time on the radio.

The Communist Party of Yugoslavia played no part in the coup, although it made a significant contribution to the mass street-protests in many cities that signalled popular support for it once it had occurred. The putsch was successful and deposed the three-member Yugoslav regency (Prince Paul, Radenko Stanković and Ivo Perović) and the government of Prime Minister Dragiša Cvetković. Two days prior to its ousting, the Cvetković government had signed the Vienna Protocol on the Accession of Yugoslavia to the Tripartite Pact (Axis). The coup had been planned for several months, but the signing of the Tripartite Pact spurred the organisers to carry it out, encouraged by the British Special Operations Executive.

Peter II Karađorđević (Serbo-Croatian: Петар II Карађорђевић, romanized: Petar II Karađorđević; 6 September 1923 – 3 November 1970) was the last King of Yugoslavia, reigning from October 1934 until he was deposed in November 1945. He was the last reigning member of the Karađorđević dynasty.

The eldest child of King Alexander I and Maria of Romania, Peter acceded to the Yugoslav throne in 1934 at the age of 11 after his father was assassinated during a state visit to France. A regency was set up under his cousin Prince Paul. After Paul declared Yugoslavia's accession to the Tripartite Pact in late March 1941, a pro-British coup d'état deposed the regent and declared Peter of age.

Živan Knežević (Serbian Cyrillic: Живан Кнежевић; 28 July 1906 – 1 December 1984) was a major in the Yugoslav Royal Guards who was a key conspirator in the Yugoslav coup d'état of 27 March 1941 that deposed the regency of Prince Paul, Dr. Radenko Stanković and Dr. Ivo Perović, as well as the government of Prime Minister Dragiša Cvetković.

Knežević and his fellow plotters declared the 17-year-old King Peter to be of age and brought to power a government of national unity led by Air Force General Dušan Simović. The coup resulted in the German-led Axis invasion of Yugoslavia during which the armed forces of Yugoslavia were defeated within 11 days. Fleeing the country by air, Knežević was based in Alexandria for a period, where he briefly commanded a battalion of Yugoslav Royal Guards formed with British assistance. He subsequently served as a military liaison officer between the Chetniks of Draža Mihailović and the Yugoslav government-in-exile then after promotion to lieutenant colonel he served as a military attaché in the United States until the end of the war, by which time he had achieved the rank of colonel. He remained in the US after the war and died in 1984.

Radoje Knežević (Serbian Cyrillic: Радоје Кнежевић; 20 August 1901 – 22 June 1983) was a key member of the group that organised the Yugoslav coup d'état of 27 March 1941 that deposed the regency of Prince Paul, Dr. Radenko Stanković and Dr. Ivo Perović, along with the government of Prime Minister Dragiša Cvetković. Following the coup he was appointed as the Minister of the Royal Court, and after the resulting invasion of Yugoslavia, he accompanied the King and government into exile in Cairo then London. Along with his brother Živan Knežević, he was a member of the so-called "League of Majors", which was at the centre of the ill-fated Greater Serbian agenda of the Yugoslav government-in-exile and who was instrumental in having Draža Mihailović appointed as Chief of Staff of the Yugoslav Supreme Command. He was sidelined in June 1943 when he was appointed to the Yugoslav legation in Portugal. He remained in exile after the war, was sentenced to 10 years imprisonment with hard labour in absentia during the Belgrade Process conducted by the country's newly-established communist authorities, and emigrated to Canada where he lived until his death in 1983.

Radenko Stanković (April 26, 1880 – December 5, 1956) was Regent of Yugoslavia for the underage Peter II from 1934 to 1941, alongside Prince Paul, the head of the regency, and Ivo Perović.

The son of a priest, he was born in Néramogyorós (Leskovica), Austria-Hungary, which today is Lescovița village, Caraș-Severin County, Romania. Leaving his native village while a schoolboy, he attended high school in Novi Sad. He began his university studies at what is now the Innsbruck Medical University and completed them at the University of Vienna, later coming to be known as the father of cardiology in Serbia.

The Yugoslav Army (Serbo-Croatian: Jugoslovenska vojska, JV, Југословенска војска, ЈВ), commonly the Royal Yugoslav Army, was the principal ground force of the Kingdom of Yugoslavia. It existed from the establishment of Yugoslavia in December 1918 until its surrender to the Axis powers on 17 April 1941. Aside from fighting along the Austrian border in 1919 and 1920 related to territorial disputes, and some border skirmishes on its southern borders in the 1920s, the JV was not involved in fighting until April 1941 when it was quickly overcome by the German-led invasion of Yugoslavia.

Shortly before the invasion, Serbian officers of the Yugoslav General Staff, encouraged by British Special Operations Executive personnel in Belgrade, led a coup d'état against Prince Paul of Yugoslavia and Dragiša Cvetković for adhering to the Tripartite Pact. Beyond the problems of inadequate equipment and incomplete mobilization, the Royal Yugoslav Army suffered badly from the Serbo-Croatian schism in Yugoslav politics. Yugoslavian resistance to the Axis invasion collapsed overnight, primarily due to a large part of the non-Serb population, Croats in particular, being unwilling to offer resistance. In its worst expression, Yugoslavia's defenses were badly compromised on 10 April 1941, when some of the units in the Croat-manned 4th and 7th Armies mutinied, and a newly formed Croatian government hailed the entry of the Germans into Zagreb the same day.