A mercenary is a professional soldier who is hired to fight for a foreign country or organization, rather than serving in their own nation's military. They are often motivated by financial gain rather than loyalty to a specific cause or government. Mercenaries can be found in various conflicts around the world, providing military services such as combat, training, and security. Historically, mercenaries have played significant roles in warfare, dating back to ancient times. They are often associated with private military companies, which are businesses that provide armed forces for hire. Notable examples of mercenaries include the Condottieri in Renaissance Italy and modern firms like Blackwater.