What role over the Hellenic Army did the person who had a dispute with Eleftherios Venizelos have?
Constantine I of Greece Constantine I (Greek: Κωνσταντῖνος Α΄ , "Konstantínos I"; 2 August [O.S. 21 July] 1868 – 11 January 1923) was King of Greece from 1913 to 1917 and from 1920 to 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. He succeeded to the throne of Greece on 18 March 1913, following his father's assassination.
Nikolaos Plastiras Nikolaos Plastiras (Greek: Νικόλαος Πλαστήρας ; 4 November 1883  – 26 July 1953) was a Greek general and politician, who served thrice as Prime Minister of Greece. A distinguished soldier and known for his personal bravery, he was known as "The Black Rider" during the Greco-Turkish War of 1919-1922. After the Greek defeat in the war, along with other Venizelist officers he staged a coup against King Constantine I of Greece and his government. The military-led government ruled until January 1924, when power was handed over to an elected National Assembly, which later declared the Second Hellenic Republic. In the interwar period, Plastiras remained a devoted Venizelist and republican. Trying to avert the rise of the royalist People's Party and the restoration of the monarchy, he led two coup attempts in 1933 and 1935, both of which failed, forcing him to exile in France.