Title: Allied leaders of World War I
Content: Victor Emmanuel III – King of Italy ; Antonio Salandra – Prime Minister of Italy (1914–1916) ; Paolo Boselli – Prime Minister of Italy (1916–1917) ; Vittorio Orlando – Prime Minister of Italy (1917–1919) ; Vittorio Italico Zupelli – Italian Minister of War (1914–1916) (1918) ; Paolo Morrone – Italian Minister of War (1916–1917) ; Gaetano Giardino – Italian Minister of War (1917) ; Vittorio Luigi Alfieri – Italian Minister of War (1917–1918) ; Luigi Cadorna – Chief of Staff of the Italian Army (1914–1917) ; Armando Diaz – Chief of Staff of the Italian Army (1917–1919) ; Emanuele Filiberto – Commander of the Third Army through all 12 Battles of the Isonzo ; Guglielmo Pecori Giraldi – Commander of the First Army (1916–1918) ; Luigi Capello – Commander of several Army Corps and later the Second Army in 1917 ; Gaetano Giardino – Commander of several 
Title: Allies of World War I
Content: Victor Emmanuel III – King of Italy ; Antonio Salandra – Prime Minister (until 18 June 1916) ; Paolo Boselli – Prime Minister (18 June 1916 – 29 October 1917) ; Vittorio Emanuele Orlando – Prime Minister (from 29 October 1917) ; Luigi Cadorna – Commander-in-Chief of the Royal Italian Army ; Armando Diaz – Chief of General Staff of the Royal Italian army ; Luigi, Duke of Abruzzi – Commander-in-Chief of the Adriatic Fleet of Italy (1914–17) ; Paolo Thaon di Revel – Admiral of the Royal Italian Navy 
Title: Benito Mussolini
Content:  Benito Amilcare Andrea Mussolini (29 July 188328 April 1945) was an Italian politician and journalist who founded and led the National Fascist Party. He was Prime Minister of Italy from the March on Rome in 1922 until his deposition in 1943, and "Duce" of Italian Fascism from the establishment of the Italian Fasces of Combat in 1919 until his execution in 1945 by Italian partisans. As dictator of Italy and co-founder of fascism, Mussolini inspired and supported the international spread of fascist movements during the inter-war period. Mussolini was originally a socialist politician and a journalist at the Avanti! newspaper. In 1912, he became 
Title: Italian entry into World War I
Content:  The Italian leadership was inexperienced, unfamiliar with international affairs, and often quite ill. Forces outside the government played minor roles. The business and financial communities wanted peace, but they were ignored in the decision-making. Likewise intellectuals and foreign policy experts, as well as nationalistic pressure groups, were ignored. The King had nominal power over war and peace, but he had severe psychiatric problems in 1914, and in any case he turned over all major issues to his cabinet. Prime Minister Antonio Salandra took office in March 1914, had little experience in foreign affairs, and had no talent or taste for statecraft. The decision for war was in the hands of Foreign Minister Antonio di San Giuliano, an experienced diplomat, cynical and cautious. He was in poor health and died in October 1914. 
Title: Axis leaders of World War II
Content: Victor Emmanuel III of Italy was King of Italy and the supreme head, with Mussolini, of the Royal Italian Army, from 1935 he became Emperor of the Italian Empire. He supported Mussolini in 1922 during the March on Rome and he named him prime minister. In 1943, after successive military defeats, he, along with Marshal Pietro Badoglio, dissolved the Fascist government, dismissed and arrested Mussolini and arranged an armistice with the Allies, setting up a Royalist government in Southern Italy led by the Marshal. ; Benito Mussolini was Prime Minister of the Kingdom of Italy from 1922 until 1943. The founder of fascism, Mussolini made Italy 
Title: Axis leaders of World War II
Content:  Mario Roatta was a general of the Italian army, best known for his role in Italian repression against civilians, in the Slovene and Croatian-inhabited areas of the Italian-occupied Yugoslavia. ; Alfredo Guzzoni was commander-in-chief of the Italian forces during the Allied Invasion of Sicily. ; Rino Corso Fougier was a general in the Royal Italian Air Force and Chief of Staff 1941-43. ; Giuseppe Fioravanzo was one of the "intellectuals" of the Regia Marina; he was one of the main authors of the development of Italian naval doctrine between the two World Wars. ; Junio Valerio Borghese was the commander of the Decima Flottiglia MAS. 
Title: Italian entry into World War I
Content:  was replaced by Sidney Sonnino, who maneuvered to join the Allies primarily to gain territory. Tommaso Tittoni, the ambassador to France, was often consulted; he also pled for joining the Allies. Civilian politicians marginalized the generals; the chief of staff died on July 1, and he was finally replaced by General Luigi Cadorna in late July. Cadorna exaggerated the Italian Army's capabilities to the unsuspecting civilians, while working hard to remove its weaknesses. All of the leaders distrusted Austria, and were eager to take control of the Austrian province of Trentino-Alto-Adige in the Alps, and the Austrian city of Trieste. They all distrusted the Ottoman Empire, and were proud that Italy had recently seized control of the Ottoman holdings in Libya. Italy, Austria and Serbia were all contending for control of Albania.
Title: Italian front (World War I)
Content:  Lieutenant General Pietro Frugoni
Title: Death of Benito Mussolini
Content:  Mussolini had been Italy's fascist leader since 1922, first as prime minister and, following his seizure of dictatorial powers in 1925, with the title Il Duce. In June 1940, he took the country into World War II on the side of Nazi Germany led by Adolf Hitler. Following the Allied invasion of Sicily in July 1943, Mussolini was deposed and put under arrest; Italy then signed the Armistice of Cassibile with the Allies in the following September. Shortly after the Armistice, Mussolini was rescued from prison in the Gran Sasso raid by German special forces and Hitler installed him as leader of the Italian Social Republic, 
Title: Luigi Cadorna
Content:  Marshal of Italy Luigi Cadorna, (4 September 1850 &ndash; 21 December 1928) was an Italian general and Marshal of Italy, most famous for being the Chief of Staff of the Italian Army from 1914-1917 of World War I. Because of the multiple and consecutive failed attacks led by him, the large number of casualties incurred among his own men (outnumbering enemy casualties), and his personal reputation as disproportionately bitter and ruthless, Cadorna is often considered one of the conflict's worst generals.

Question: who was the italian leader in ww1?
Answer: Benito Mussolini.