Davis covered major conflicts including the Greco-Turkish War, the Spanish-American War, the Second Boer War, and the early stages of World War I. Writing for publications such as the New York Herald and Harper's Weekly, he played an influential role in shaping American public opinion during the Cuban crisis.
Among his major works are the short story collections "Gallegher and Other Stories" (1891) and "Van Bibber and Others" (1892); the novels "Soldiers of Fortune" (1897), "Captain Macklin" (1902), "The Bar Sinister" (1903), and "The Scarlet Car" (1907); and war accounts such as "The Cuban and Porto Rico Campaigns" (1898), "With Both Armies in South Africa" (1900), and "With the Allies" (1914). Davis died in 1916, leaving a lasting legacy as a pioneer of American journalism and popular adventure fiction.