By-Ways of War: The Story of the Filibusters

Today, the term "filibuster" refers to a tactic used by loquacious lawmakers who seek to prevent a vote by delivering marathon-length speeches. But in the past, the term had a different meaning -- it referred to freelance mercenaries who traveled to foreign countries with the aim of sparking a war or revolution. James Jeffrey Roche presents a fascinating history of the practice in By-Ways of War.