Rare King Constantine I of Greece & General Panagiotis Danglis (at that time serving as war minister) Hand Signed Royal Document / Order / Autograph Athens in 20th September 1915 Condition: Good+ Original official marking and notations throughout margin Document measures approximately 13.5" x 8.5" Paper type is laid. No watermark. Guaranteed original and authentic! 4 Pages. Constantine I (1868 – 1923) 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. Panagiotis Danglis (Greek: Παναγιώτης Δαγκλής; 29 November [O.S. 17 November] 1853 – 9 March 1924) was a Hellenic Army general and politician. He is particularly notable for his invention of the Schneider-Danglis mountain gun, his service as chief of staff in the Balkan Wars and his participation in the Triumvirate of the Provisional Government of National Defence during World War I.