Trentino-Alto Adige in the context of "Bolzano"

The Anniversary of the Unification of Italy (Italian: Anniversario dell'Unità d'Italia) is a national day that falls annually on 17 March and celebrates the birth of Italy as a modern nation state, which took place following the proclamation of the Kingdom of Italy on 17 March 1861.

However, the complete unification of Italy took place only in the following years. In 1866 the Veneto and the province of Mantua were annexed after the Third Italian War of Independence, then in 1870 Lazio after the capture of Rome, and finally in 1918 Trentino-Alto Adige and Julian March after the First World War. In this regard, the National Unity and Armed Forces Day (Victory Day) was also established, which is celebrated annually on 4 November, recalling the Italian victory in the First World War, a war event considered to complete the process of unification of Italy.

The Rhaetian Alps (Italian: Alpi Retiche; German: Rätische Alpen) are a mountain range of the Eastern Alps. The SOIUSA classification system divides them into the Western, Southern Rhaetian Alps and Eastern Rhaetian Alps, while the Alpine Club classification of the Eastern Alps places most of the Rhaetian subranges within the Western Limestone Alps.

They are located along the Italian–Swiss and Austrian–Swiss borders, in the canton of Graubünden in eastern Switzerland; in the state of Tyrol in Austria; and in the Italian regions of Trentino-Alto Adige and Lombardy.

The Italian front (Italian: Fronte italiano; German: Südwestfront) was one of the main theatres of war of World War I. It involved a series of military engagements along the border between the Kingdom of Italy and Austria-Hungary from 1915 to 1918. Following secret promises made by the Entente in the 1915 Treaty of London, the Kingdom of Italy entered the war on the Entente side, aiming to annex the Austrian Littoral, northern Dalmatia and the territories of present-day Trentino and South Tyrol. The front soon bogged down into trench warfare, similar to that on the Western Front, but at high altitudes and with extremely cold winters. Fighting along the front displaced much of the local population, and several thousand civilians died from malnutrition and illness in Kingdom of Italy and Austro-Hungarian refugee camps.

Military operations came to an end in 1918 with Italian victory and the capture of Trento and Trieste by the Royal Italian Army. Austria-Hungary disintegrated due to military defeats and subsequent turmoils caused by pacifists and separatists. All military operations on the front came to an end with the entry into force of the armistice of Villa Giusti on 4 November 1918. Italy entered into World War I also with the aim of completing national unity with the annexation of Trentino-Alto Adige and the Julian March; for this reason, the Italian intervention in the World War I is also considered the Fourth Italian War of Independence, in a historiographical perspective that identifies in the latter the conclusion of the unification of Italy, whose military actions began during the revolutions of 1848 with the First Italian War of Independence.

Archaeolepidotus is an extinct genus of prehistoric marine holostean bony fish that lived during the latest Permian or earliest Triassic in what is now Trentino-Alto Adige, Italy. It contains a single species, A. leonardii. It is among the earliest known fossil neopterygians, and is usually recovered as a semionotiform, but others recover it as a parasemionotiform.

Although initially recovered as being from the Early Triassic Werfen Formation, more recent analyses suggest that it is very unlikely to be from the Triassic sediments of that formation. It is thus thought to actually originate from the Late Permian Bellerophon Formation, making it particularly ancient.