The crystallization of popular opinion in favor of intervention kept pace with the trend of diplomatic negotiations. Italy, especially the northern provinces, was a great beehive, humming with patriotic fervor. Evenings in almost any northern town might be seen companies of young men in civilian dress marching in companies and maneuvering with military precision. At first the organizers of these "training walks," as they were called, maintained reticence regarding their purpose. The youths, they said, were merely undergoing voluntary training to be ready "in case they should be needed." But the purpose of these volunteer drills was unmistakable. At times, when the drill grounds were rather isolated, the marchers would burst into patriotic songs--the hymn of the Garibaldians, or, perhaps "Trieste of My Heart." Soon the neutralists began to organize counterpreparations. Encounters between bands of the rival factions became increasingly frequent, in fact daily occurrences. From jeers they passed to scuffles, in which missiles and clubs were the weapons. As a rule these encounters took place far enough from the city limits to avoid interference by the police, and only vague reports of them reached the main body of home-loving citizens. Milan was the center of these demonstrations. During April, 1915, the Socialists proclaimed a "general strike," which left a large part of the working population idle to attend gatherings addressed by the neutralist orator. These meetings generally wound up with a parade, and perhaps a hostile demonstration in front of the office of some interventionist newspaper, or cheers outside the German Consulate. The next day the Piazza would be thronged with a gathering of interventionists wearing the national colors entwined with the flag of Trieste, and, perhaps, with the "honorable red shirt" of the Garibaldians. During the period just before the entrance of Italy into the war these rival processions were held on different days by order of the police, who ruthlessly broke up any attempt to interfere with assemblies entitled to the right of way. As the war party began to gain, their opponents adopted the custom of attacking the demonstrants after they had disbanded. As it was, a mob attacked the Milan branch of the Siemens-Schuckert works, the great Berlin electrical machinery factory, battered in the main entrance, and exchanged shots with some young German employees left in charge. The timely arrival of the armed police stopped this riot, and removed the Germans to safe quarters.