George II of Greece in the context of "1924 Greek republic referendum"

The 4th of August Regime (Greek: Καθεστώς της 4ης Αυγούστου, romanized: Kathestós tis tetártis Avgoústou), commonly also known as the Metaxas regime (Καθεστώς Μεταξά, Kathestós Metaxá), was a dictatorial regime under the leadership of General Ioannis Metaxas that ruled the Kingdom of Greece from 1936 to 1941.

On 4 August 1936, Metaxas, with the support of King George II, suspended the Greek parliament and went on to preside over a conservative, staunchly anti-communist and ultranationalist government under the ideology of Metaxism, which has been described either as an authoritarian conservative system or as a Greek variation of Fascism; a middle position is that it was a regime with a strong Fascist component or a para-fascist regime. Metaxas himself and some contemporary historians have described the government as totalitarian. In its symbolism and rhetoric, the regime took inspiration from Fascist Italy, but it retained close links to Britain and the French Third Republic, rather than the Axis powers.

Constantine II (Greek: Κωνσταντίνος Βʹ, romanized: Konstantínos II, pronounced [ˌkonsta(n)ˈdinos o ˈðefteros]; 2 June 1940 – 10 January 2023) was the last King of Greece, reigning from 6 March 1964 until the abolition of the Greek monarchy on 1 June 1973.

Constantine was born in Athens as the only son of Crown Prince Paul and Crown Princess Frederica of Greece. Being of Danish descent, he was also born as a prince of Denmark. As his family was forced into exile during the Second World War, he spent the first years of his childhood in Egypt and South Africa. He returned to Greece with his family in 1946 during the Greek Civil War. After Constantine's uncle, George II, died in 1947, Paul became the new king and Constantine the crown prince. As a young man, Constantine was a competitive sailor and Olympian, winning a gold medal in the 1960 Rome Olympics in the Dragon class along with Odysseus Eskitzoglou and George Zaimis in the yacht Nireus. From 1964, he served on the International Olympic Committee.

Paul (Greek: Παύλος, romanized: Pavlos; 14 December 1901 – 6 March 1964) was King of Greece from 1 April 1947 until his death on 6 March 1964.

Paul was born in Athens as the third son of Crown Prince Constantine and Crown Princess Sophia of Greece. In 1912, the year before his father ascended the throne, Paul joined the Royal Hellenic Navy at eleven years old, becoming the youngest cadet at the time. After the National Schism during World War I, Constantine's abdication was forced and Paul and his family went into exile in Switzerland. Paul's brother, Alexander, became the Greek sovereign in 1917 when Constantine and Paul were exiled, however, Alexander's death in 1920 led to Constantine's restoration. In 1922, Paul's other brother, George, became the monarch. However, a referendum in 1924 two years later saw the abolition of the Greek monarchy. Paul moved to Italy with his family and then to London.

Ioannis Metaxas (Greek: Ιωάννης Μεταξάς; 12 April 1871 – 29 January 1941) was a Greek military officer and politician who was the dictator of Greece from 1936 until his death in 1941. He governed constitutionally for the first four months of his tenure, and thereafter as the strongman leader of the 4th of August Regime following his appointment by King George II.

Born to an aristocratic family in Ithaca, Metaxas took part in the Greco-Turkish War of 1897 and the Balkan Wars (1912–13), and quickly rose through the ranks of the Hellenic Army. As a monarchist during the National Schism, Metaxas unsuccessfully opposed Prime Minister Eleftherios Venizelos and Greece's entry in World War I, most famously leading monarchist forces during the Noemvriana; he was exiled to Corsica in response in 1917. On his return, Metaxas moved into politics and founded the Freethinkers' Party, but had only limited success under the Second Hellenic Republic.

Alexander (Greek: Αλέξανδρος, romanized: Aléxandros; 1 August 1893 – 25 October 1920) was King of Greece from 11 June 1917 until his death on 25 October 1920.

The second son of King Constantine I, Alexander was born in the summer palace of Tatoi on the outskirts of Athens. He succeeded his father in 1917, during World War I, after the Entente Powers and the followers of Eleftherios Venizelos pushed King Constantine and his eldest son, Crown Prince George, into exile. Having no real political experience, the new king was stripped of his powers by the Venizelists and effectively imprisoned in his own palace. Venizelos, as prime minister, was the effective ruler with the support of the Entente. Though reduced to the status of a puppet king, Alexander supported Greek troops during their war against the Ottoman Empire and Bulgaria. Under his reign, the territorial extent of Greece considerably increased, following the victory of the Entente and their Allies in the First World War and the early stages of the Greco-Turkish War of 1919–1922.