Conventional warfare is a form of warfare conducted by using conventional weapons and battlefield tactics between two or more states in open confrontation. The forces on each side are well-defined, and fight using weapons that primarily target the opponent's military. It is normally fought using conventional weapons, and not with chemical, biological, or nuclear weapons. The general purpose of conventional warfare is to weaken or destroy the opponent's military, thereby negating its ability to engage in conventional warfare. In forcing capitulation, however, one or both sides may eventually resort to unconventional warfare tactics.