CONSTANTINE, king of the Hellenes (1868-1923), eldest son of George I. and of the Grand Duchess Olga Constantinova of Russia, was born at Athens on Aug. 2, 1868. The prince com pleted his education in Germany, where he attended the univer sity of Leipzig, served in the Guards and studied at the Prussian Staff college. In 1889 he married the Princess Sophia Dorothea of Hohenzollern, daughter of the Emperor Frederick. This union was popular in Greece because of the superstition that when a Constantine and a Sophia were upon the throne the empire of Byzantium would be restored, and, coupled with the fact that he was appointed a field marshal in the Prussian Army in 1913, it affected the king's attitude during the World War.
On returning to Greece, the crown prince was given various military appointments; in 1897 he took over the command of the army in Thessaly, and he was held largely responsible for the disastrous campaign of that year. In 1909 Constantine and his brothers were once more made scapegoats by the Military league, and were compelled to resign their commissions. Subsequently, on the initiative of Venizelos, the royal princes were recalled from their practical exile. Thenceforward, acting in co-operation with the French military mission, Constantine, now inspector-general of the army, devoted h::nself to . reforms which were markedly apparent during the Balkan wars, and the successes that were then gained completely re-established his prestige. He succeeded his father on the throne of Greece on March 18, 1913.
This was agreed to and a formal apology was made for the events of Dec. I, but it soon became obvious that the king's attitude con stituted a danger to the Allied position at Salonika.
In June 1917 M. Jonnart, the High Commissioner of the protecting Powers, arrived at Athens, where, backed up by strong forces, he demanded better guarantees for the safety of the Allied army in Macedonia, a more loyal adherence to the constitution and the departure of the king. Constantine, accompanied by the queen and the crown prince, sailed from Greece on June 12, leav ing his son Alexander upon the throne ; but the proclamation then issued by the king was ambiguous, and contained no final renun ciation of his rights. Constantine spent the next three years in Switzerland.
As a result of the election of Nov. 1920, and of the subsequent plebiscite, Constantine returned to Athens at the end of Decem ber. His position was exceedingly difficult. Never recognized by Great Britain and France, he was compelled either to pursue the Asiatic policy of his predecessors or to make himself unpopular by sacrificing gains promised to Greece under the already signed Treaty of Sevres. Rightly or wrongly, he adopted the former alternative ; he declared himself in favour of a continuation of the Turkish campaign, and he failed to condemn, if he never en couraged, the Greek objections to the several offers of mediation made by the Western Powers. For the disastrous results of the campaign in Asia Minor see GREECE : History. By the last week in Sept. 1922 an insurrection had broken out in the army, and, at the demand of a revolutionary committee headed by Col. Gonatas, the king abdicated in favour of his son George. On Sept. 3o Con stantine left Athens for Palermo, where he died on Jan. 1923, from haemorrhage of the brain.