[Trevelyan's] great work was his Garibaldi trilogy (1907–11), which established his reputation as the outstanding literary historian of his generation. It depicted Garibaldi as a Carlylean hero—poet, patriot, and man of action—whose inspired leadership created the Italian nation. For Trevelyan, Garibaldi was the champion of freedom, progress, and tolerance, who vanquished the despotism, reaction, and obscurantism of the Austrian empire and the Neapolitan monarchy. The books were also notable for their vivid evocation of landscape (Trevelyan had himself followed the course of Garibaldi's marches), for their innovative use of documentary and oral sources, and for their spirited accounts of battles and military campaigns.