A major hindrance to Italy's decision on what to do about the war was the political instability throughout Italy in 1914. After the formation of the government of Prime Minister Antonio Salandra in March 1914, the government attempted to win the support of nationalists and moved to the political right. At the same time, the left became more repulsed by the government after the killing of three anti-militarist demonstrators in June. Many elements of the left including syndicalists, republicans and anarchists protested against this and the Italian Socialist Party declared a general strike in Italy. The protests that ensued became known as "Red Week" as leftists rioted and various acts of civil disobedience occurred in major cities and small towns such as seizing railway stations, cutting telephone wires and burning tax-registers. However, only two days later the strike was officially called off, though the civil strife continued. Militarist nationalists and anti-militarist leftists fought on the streets until the Italian Royal Army forcefully restored calm after having used thousands of men to put down the various protesting forces. Following the invasion of Serbia by Austria-Hungary in 1914, World War I broke out. Despite Italy's official alliance to Germany and membership in the Triple Alliance, the Kingdom of Italy initially remained neutral, claiming that the Triple Alliance was only for defensive purposes.