Holy See
Although the Holy See is sometimes metonymically referred to as the "Vatican", the Vatican City State was distinctively established with the Lateran Treaty (1929) between the Holy See and Italy to ensure the temporal, diplomatic, and spiritual independence of the Papacy. As such, ambassadors are officially accredited to the Holy See and not the Vatican City State. Conversely, Papal nuncios to states and international organisations are recognised as representing the Holy See and the integrity of the Catholic Church along with its 1.3 billion members, not the Vatican City State, as prescribed also in the Canon law of the Catholic Church (1983). The "Holy See" thus refers to the See of Rome viewed as the central government of the Catholic Church. The Catholic Church, in turn, is the largest non-government provider of education and health care in the world, while the diplomatic status of the Holy See facilitates the access of its vast international network of charities.
History of the Kingdom of Italy (1861–1946)
In 1929 Mussolini signed the Lateran Pacts with the Roman Catholic Church (with which Italy had been in conflict since the annexation of Rome in 1870), leading to the formation of the tiny independent state of Vatican City. He was initially on friendly terms with France and Britain, but the situation changed in 1935–36, when Italy invaded the Ethiopian Empire despite their opposition (Second Italo-Abyssinian War); because of this and of the ideological affinities with the Nazi party led by Hitler. It was a main part of the Axis Powers in World War II with allies being Imperial Japan and Nazi Germany as the "Rome-Berlin-Tokyo Axis".