Alexander was King of Greece from 11 June 1917 until his death in 1920.
King Alexander c. 1917
Alexander with four of his siblings in 1905. Clockwise from far left: Helen, George, Alexander, Paul and Irene.
Alexander's father, Constantine I, in the uniform of a German field marshal, c. 1913
Eleftherios Venizelos, Greek revolutionary and prime minister, c. 1919
Constantine I was King of Greece from 18 March 1913 to 11 June 1917 and from 19 December 1920 to 27 September 1922. He was commander-in-chief of the Hellenic Army during the unsuccessful Greco-Turkish War of 1897 and led the Greek forces during the successful Balkan Wars of 1912–1913, in which Greece expanded to include Thessaloniki, doubling in area and population. The eldest son of George I of Greece, he succeeded to the throne following his father's assassination in 1913.
Constantine I in 1921
Constantine as member of the international committee for organization of the 1896 Summer Olympics.
King Constantine I during the Second Balkan War
Constantine with George I and the Greek Army enter Thessaloniki