Thomas Fairfax, 3rd Lord Fairfax of Cameron (1612-1671), was an English soldier and politician known for his role during the English Civil War. He served as a key commander for the Parliamentary forces, leading troops against the Royalists loyal to King Charles I. His military strategies and leadership contributed significantly to several important victories. Fairfax was also a member of the Long Parliament and played a crucial role in the political landscape of England during the 17th century. After the war, he became involved in the Commonwealth of England and was known for his moderate views, advocating for peace and stability in the nation.