Fire Suppression has two primary areas of focus that require very different equipment, training and strategy.
Structure (building) fires require the expertise of firefighters that have knowledge and equipment that allows the flow of large volumes of water, search and rescue of occupants trapped inside a building, and the removal of harmful gasses and smoke.
Wildland (brush) Fires require a completely different set of skills although brush fires will often result in structure fires that are in its path of destruction. Wildland fires depend on a fast attack of smaller trucks that have all terrain capability and the firefighters that wear a completely different set of protective gear. You won't often see your firefighters wearing the heavy clothing and breathing apparatus. You will see them in much lighter gear with small hand tools and small hose lines along with bulldozers and aerial water drops when needed.