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
The Hellenic Army, formed in 1828, is the land force of Greece. The term Hellenic is the endogenous synonym for Greek. The Hellenic Army is the largest of the three branches of the Hellenic Armed Forces, also constituted by the Hellenic Air Force (HAF) and the Hellenic Navy (HN). The army is commanded by the chief of the Hellenic Army General Staff (HAGS), which in turn is under the command of Hellenic National Defence General Staff (HNDGS).
Alexander Ypsilantis (in Sacred Band uniform) crosses the Pruth, starting the Greek War of Independence. Painting by Peter von Hess
Demetrios Ypsilantis was commander of the tactical Greek forces during the Battle of Petra (1829), final battle of the War of Independence
Theodoros Kolokotronis, the most important commander of the Greek irregular forces during the Revolution
Panagiotis Rodios, as Army's colonel, one of the early supporters for the creation of regular army during the Revolution