The Noemvriana of December [O.S. November] 1916, or the Greek Vespers, was a political dispute which led to an armed confrontation in Athens between the royalist government of Greece and the forces of the Allies over the issue of Greece's neutrality during World War I.
Bird's eye view of Athens and its suburbs during the Noemvriana clashes, published by The Sphere in December 1916
Constantine confers with Prime Minister Eleftherios Venizelos and members of the Greek General Staff prior to the Conference of Bucharest that ended the Balkan Wars.
King Constantine I dressed as a German Field Marshal. His German sympathies caused him to favor a course of neutrality in the First World War.
The "Triumvirate of National Defence": (L-R) Admiral Kountouriotis, Venizelos, and General Danglis
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