An unenclosed and freely expanding combustion event that consumes the natural fuels of a forest, such as duff, grass, weeds, brush, and trees is referred to as a forest fire. Forest fires can be classified into three types, with the distinctions being based mostly on their manner of propagation and their location in relation to the ground surface. The native American peoples used a pine top or a moist gunny bag to put out surface fires. They typically fought ground fires by digging ditches through which the flames could not jump over them.Wildfires can be classified into three categories: ground fires, surface fires, and crown fires. Ground fires are caused by the ignition of plant roots and other organic substances beneath the soil surface. These fires have the potential to develop into surface fires, which burn dead or dried vegetation that is lying or growing just above the surface of the earth.