Overview
The Kingdom of Greece was established in 1832 and was the successor state to the First Hellenic Republic. It was internationally recognised by the Treaty of Constantinople, where Greece also secured its full independence from the Ottoman Empire after nearly four centuries.
The Kingdom of Greece was dissolved in 1924 and the Second Hellenic Republic was established following Greece's defeat by Turkey in the Asia Minor Campaign. A military coup d'état restored the monarchy in 1935 and Greece became a kingdom again until 1973. The kingdom was finally dissolved in the aftermath of a seven-year military dictatorship (1967–1974) and the Third Hellenic Republic was established following a referendum held in 1974.
Background
The Greek-speaking Eastern Roman Empire, also known as the Byzantine Empire, which ruled most of the Eastern Mediterranean region for over 1100 years, had been fatally weakened since the sacking of Constantinople by the Latin Crusaders in 1204.
From Wikipedia (CC BY-SA 4.0).