Constantine I was King of Greece from 18 March 1913 to 11 June 1917 and again from 19 December 1920 to 27 September 1922. The eldest son of George I of Greece, he succeeded to the throne following his
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
Alexander was King of Greece from 11 June 1917 until his death on 25 October 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
From left to right: Lieutenant General George Milne (commander of the British Salonika Force) with King Alexander I of Greece and Lieutenant General Charles Briggs, GOC XVI Corps of the BSF, 1917.