Suing for peace is an act by a warring nation to initiate a peace process. Suing for peace is usually initiated by the losing party in an attempt to stave off an unconditional surrender and may sometimes be favorable to the winning nation, as prosecuting a war to a complete or unconditional surrender may be costly.
However, pressing for peace may sometimes be started by the winning faction as a means to end the war for several reasons, such as where additional conflict would not be in the perceived best interest of the winning party. In this case, demands might be made, or the two nations may agree to a "white peace", or Status quo ante bellum.