A ceasefire (or truce) is a temporary stoppage of a war in which each side agrees with the other to suspend aggressive actions. Ceasefires may be declared as part of a formal treaty, but they have also been called as part of an informal understanding between opposing forces. A ceasefire is usually more limited than a broader armistice, which is a formal agreement to end fighting. Successful ceasefires may be followed by armistices, and finally by peace treaties.