The Greco-Italian War, also called the Italo-Greek War, Italian campaign in Greece, Italian invasion of Greece, and War of '40 in Greece, took place between Italy and Greece from 28 October 1940 to 23 April 1941. This conflict began the Balkans campaign of World War II between the Axis powers and the Allies, and eventually turned into the Battle of Greece with British and German involvement. On 10 June 1940, Italy declared war on France and the United Kingdom. By September 1940, the Italians had invaded France, British Somaliland and Egypt. This was followed by a hostile press campaign in Italy against Greece, accused of being a British ally. A number of provocations culminated in the sinking of the Greek light cruiser Elli by the Italians on 15 August. On 28 October, Mussolini issued an ultimatum to Greece demanding the cession of Greek territory, which the Prime Minister of Greece, Ioannis Metaxas, rejected.
The Evzones or Evzonoi were a type of light infantry units in the Hellenic Army. Today, they are the members of the Presidential Guard, a ceremonial unit that guards the Greek Tomb of the Unknown Soldier and the Presidential Mansion in Athens. An Evzone is also known, colloquially, as a Tsoliás. Evzones are known for their distinctive uniform, which evolved from the clothes worn by the klephts who fought the Ottoman occupation of Greece. The most visible item of this uniform is the fustanella, a kilt-like garment. Their distinctive dress turned them into a popular image for the Greek soldier, especially among foreigners.
The Battle of Bizani took place in Epirus on 4–6 March [O.S. 19–21 February] 1913. The battle was fought between Greek and Ottoman forces during the last stages of the First Balkan War, and revolved around the forts of Bizani, which covered the approaches to Ioannina, the largest city in the region.
Charalambos Katsimitros was a Greek general who distinguished himself during the Italian invasion of Greece.
The I Army Corps was an army corps of the Hellenic Army, founded in December 1913. Originally based in Athens and covering southern Greece, since 1962 it was responsible for covering Greece's northwestern borders. It was disbanded in 2013.
The 1st Infantry Division "Smyrni" is a historic and elite division of the Hellenic Army. It was founded in 1897 as an infantry division and has fought in all major conflicts in which Greece has been involved. During the Balkan Wars, it acquired the sobriquet "Iron Division".
The Battle of Elaia–Kalamas took place in Epirus on 2–8 November 1940. The battle was fought between the Greeks and the Italians during the initial stage of the Greco-Italian War in World War II. The Italian Army, deployed on the Greek-Albanian border, launched an offensive against Greece on 28 October 1940. The main thrust of the Italian invasion occurred in the Epirus sector, with a further flanking move through the Pindus mountains. In Epirus, the Greeks held the Elaia–Kalamas river line, and, even though the Greek army was outnumbered, the local Greek forces under Major General Charalambos Katsimitros stopped the Italian advance. Along with the Italian failure in the Battle of Pindus, these Greek successes signified the complete failure of the Italian invasion, leading to the dismissal of the Italian commander in Albania, Sebastiano Visconti Prasca, on 9 November. In the next few weeks the Greek forces initiated a counteroffensive that forced the Italians to retreat deep into Albania.
The 3/40 Evzone Regiment or 40th Evzone Regiment is a historic regiment of Evzones of the Hellenic Army, recruited in Epirus and headquartered in Arta. It was formed in 1913 after the Balkan Wars, and disbanded in the post-World War II period. It exists today as a nominal reserve formation to be mobilized in wartime.
The following is the order of battle of the Hellenic Army during the First Balkan War of 1912–1913.
The 15th Infantry Division was an infantry division of the Hellenic Army. Established for the first time briefly in 1915–1916, it was re-established in 1940, during the Greco-Italian War. The division distinguished itself in the war, where it took part in some of the most significant battles of the conflict. It was disbanded after the Battle of Greece, re-established after liberation in 1945 and subsequently fought in the Greek Civil War. It remained active in the Kastoria, Grevena and Florina areas until 1998, when it was reorganized and renamed as the 15th Infantry Brigade.
The 3rd Infantry Division was an infantry division of the Hellenic Army.
The V Army Corps, sometimes found as Army Corps E, was an army corps of the Hellenic Army, active in the struggles in Northern Epirus in 1913–1914 and in the Greco-Italian War.
Konstantinos Versis was a Greek Army officer and hero of World War II.
The 4th Infantry Division is a formation of the Hellenic Army. Founded in 1912 as an infantry division, it continues to exist today as a reserve and training formation, headquartered in Tripoli, Peloponnese.
The 6th Infantry Division was an infantry division of the Hellenic Army.
The Epirus Army Section was a field army of the Hellenic Army active between 14 February and 20 April 1941 during the Greco-Italian War and the Battle of Greece.
The 13th Infantry Division was an infantry division of the Hellenic Army.
The 14th Infantry Division was an infantry division of the Hellenic Army.
The 17th Infantry Division was an infantry division of the Hellenic Army that fought in the Greco-Italian War.
The 18th Infantry Division was an infantry division of the Hellenic Army that fought in the Battle of the Metaxas Line.
Greece 
Hellenic Army 