A flamethrower is a device designed to project a long stream of fire. It typically consists of a fuel tank, a nozzle, and a mechanism to ignite the fuel. Flamethrowers have been used in military applications, particularly during World War I and World War II, for clearing obstacles and in trench warfare. In addition to military use, flamethrowers have applications in agriculture, such as controlled burns for land management. They can also be used in firefighting to create firebreaks. However, due to their potential for destruction, flamethrowers are heavily regulated in many countries.