Why didn't the soldiers have enough to eat during the war?

An old soldier who participated in the 79-year self-defense counterattack against Vietnam told you that it was not that "the soldiers didn't have enough to eat during the war", but that before we set off, cadres who had experience in the War to Resist US Aggression and Aid Korea would tell us young officers and men who had never fought: "There must be room for rations." In fact, this is indeed the case. Once the fighting started, and it was outside the country, there was basically no timely food supplement, that is, the rice seized by the Vietnamese devils (all supported by China) was also raw; Moreover, after entering the wartime state, as officers and men participating in the war, they simply don't know the time to return, so the daily rations saved are life-saving treasures that have always supported us to get the order to return to the motherland.