That would be incorrect for 99% of cases in the war. Commanders were trying to get into the best possible position for continued bargaining and/or the armistice

That would be incorrect for 99% of cases in the war. Commanders were trying to get into the best possible position for continued bargaining and/or the armistice was broken. Who wants to be the position that's overrun because at the last second, the other guy decides to storm your position?