In March 1945 he returned to the Carrara area, and gathering a group of around twenty men, returned into the Apuan Alps above the city. They established a new fighting brigade, this time named after the Sardinian-American anarchist who had been arrested in 1931 on strong suspicion of plotting to assassinate the leader, and executed in May following a brief trial rapidly organised and conducted earlier that month before the . During March 1945 the Anglo-American armies finalised preparations for what proved to be the [[Spring 1945 offensive in Italy |final assault on the German "[[Gothic line]]" defences. The [[15th Army Group]] launched their attack on 6 April 1945. [[Massa]] was liberated on 10 April 1945. The next day it was the turn of [[Carrara]]. The invading armies arrived accompanied by several units of partisans from the mountains behind the city, including Mazzucchelli's. During the days following liberation approximately 710 German soldiers were captured by the partisans and handed over to the allied military authorities.