Universal morality

I was struck by the truth found in the statement that there can be no absolute or universal morality, much less a strict definition of morality itself. When confronted with that, I tried to see if i could count any of my morals as universal, which i could not, and i even found that a couple of the author's chosen virtues could not be counted universal either. Those virtues are among the best, and yet at times like war and struggle, times when morals are often turned against themselves, these morals would be better if postponed. So it seems that there can be no permanent moral code for all people to follow at all times, but rather a code of rotations. Morals that are to be used as the situation permits, but that should not be used to cover all situations. tell me what you think.