and similar harsh judgments of the anti-Habsburg Thusis court led to a conspiracy to drive the Protestants out of the valley. The leader of the conspiracy, Giacomo Robustelli of the Planta family, had ties to Madrid, Rome and Paris. On the evening of 18/19 July 1620, a force of Valtellina rebels supported by Austrian and Italian troops marched into Tirano and began killing Protestants. When they finished in Tirano, they marched to Teglio, Sondrio and further down the valley killing every Protestant that they found. Between 500 and 600 people were killed on that night and in the following four days. The attack drove nearly all the Protestants out of the valley, prevented further Protestant incursions and took the Valtellina out of the Three Leagues. The killings in Valtellina were part of the conflicts in Graubünden known as the Bündner Wirren or Confusion of the Leagues. In February 1623 France, Savoy, and Venice signed the Treaty of Paris in which all three signatories agreed to re-establish the territory of Valtellina by attempting to remove Spanish forces stationed there. 18th and 19th centuries In 1797 the growing power of the First French Republic created the Cisalpine republic in Northern Italy. On 10 October 1797, the French supported a revolt in the Valtellina against the Graubünden (Grisons in French and English), and it joined the Cisalpine Republic. After the Congress of Vienna in 1815 the Valtellina became part of the Kingdom of Lombardy–Venetia, which was a constituent land of the Austrian Empire. In 1859 it came, together with Lombardy, to the Kingdom of Sardinia, and finally in 1861 it became part of the Kingdom of Italy. At the end of the 19th century there was substantial migration out of the Valtellina for reasons of the prevailing economically depressed conditions of the region and for young men to avoid conscription. Australia, especially Western Australia, was a popular destination for such migrants. Industrially, the area is famous as the home of the world's first mainline electrified railway. The electrification of the Ferrovia della Valtellina took place in 1902, using three-phase power at 3,600 V, with a maximum speed of 70 km/h. The system was designed by the brilliant Hungarian engineer Kálmán Kandó who was employed by main contractors the Budapest-based Ganz company. Mussolini and the Valtellina Redoubt During the last months of World War II, the Italian dictator Benito Mussolini and other diehard fascist