 Complete the following phrase:  On 9 March 1937 the 49th Mixed Brigade had its baptism of fire at the Guadalajara Front, where it became part of the Republican forces that fought the Fascist Italian Corpo Truppe Volontarie. Anti-Fascist Italian Major Arturo Zanoni took the command of the unit relieving de la Macorra for a brief period of time. He was then replaced by Infantry Commander Fulgencio González Gómez who had been captain at the 15th Almansa Regiment Regimiento Almansa no 15 in Tarragona. The commissar was Francisco Antón Sanz. After the Battle of Guadalajara the unit was sent to the 