About Garibaldi (from Wikipedia):
Giuseppe Garibaldi (4 July 1807 – 2 June 1882) was an Italian general and nationalist. A republican, he contributed to the Italian unification and the creation of the Kingdom of Italy. He is considered one of the greatest generals of modern times and one of Italy’s “fathers of the fatherland” along with Camillo Benso, Count of Cavour, Victor Emmanuel II of Italy and Giuseppe Mazzini.
Garibaldi is also known as the “Hero of the Two Worlds” because of his military enterprises in Brazil, Uruguay and Europe. He commanded and fought in many military campaigns that led eventually to the Italian unification. In 1848, the provisional government of Milan made Garibaldi a general, and in 1849, the Minister of War promoted him to General of the Roman Republic to lead the Expedition of the Thousand on behalf and with the consent of Victor Emmanuel II. His last military campaign took place during the Franco-Prussian War, as commander of the Army of the Vosges.
Garibaldi was very popular in Italy and abroad, aided by exceptional international media coverage at the time. Many great intellectuals of the time, such as Victor Hugo, Alexandre Dumas, and George Sand, showered him with admiration. The United Kingdom and the United States helped him a great deal, offering him financial and military support in difficult circumstances. In the popular telling of his story, he is associated with the red shirts that his volunteers, the Garibaldini, wore in lieu of a uniform.
About Trevelyan (from Wikipedia):
George Macaulay Trevelyan OM CBE FRS FBA (16 February 1876-21 July 1962), was a British historian and academic. He was a Fellow of Trinity College, Cambridge, from 1898 to 1903. He then spent more than twenty years as a full-time author. He returned to the University of Cambridge and was Regius Professor of History from 1927 to 1943. He served as Master of Trinity College from 1940 to 1951. In retirement, he was Chancellor of Durham University.
Many of his writings promoted the Whig Party, an important aspect of British politics from the 17th century to the mid-19th century, and its successor, the Liberal Party. Whigs and Liberals believed the common people had a more positive effect on history than did royalty and that democratic government would bring about steady social progress.
Trevelyan’s history is engaged and partisan. Of his Garibaldi trilogy, “reeking with bias”, he remarked in his essay “Bias in History”, “Without bias, I should never have written them at all. For I was moved to write them by a poetical sympathy with the passions of the Italian patriots of the period, which I retrospectively shared.”