 Complete the following phrase:  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 