In Portugal, the deposition of the King in 1910 was followed by a strike wave throughout the country. After the police occupied the offices of an agricultural union, syndicalists called for a general strike. During the strike, Lisbon was controlled by workers and there were armed uprisings in several other cities. In 1912, the strike wave ebbed off. Italian syndicalists successfully organized agricultural workers in the Po Valley by uniting different parts of agricultural working class. They were most successful in areas where the reformist union Federterra had been thwarted by employers. Syndicalists led large strikes by farm workers in Parma and Ferrara in 1907–1908, but these strikes failed as a result of employers' strikebreaking tactics and infighting among workers. In 1911–1913, syndicalists played an important role in a large strike wave in Italy's industrial centers. The syndicalist union confederation USI was formed in 1912 by veterans of both strike movements.