Sentence:  THE Italian brigade in the Argonne, under the leadership of Peppino Garibaldi, four years junior to D'Annunzio and grandson of the great hero, had fought bravely but in vain against the superior forces of their German opponents. Five hundred of the original 2,000 <WSD>red-shirts</WSD> had been killed, wounded, or lost in the fighting; the depleted force was disbanded on 5 March 1915.' 
Meaning of the word marked with <WSD> tags:  A follower of Garibaldi