3.Should countries leave pieces of their history out, especially that which is negative, when documenting these stories?

If we study history, we have to know an oppinion of loosers and winners. Because I am sure they would tell so different stories! So if your country took part in the war or revolution, we must know it! Even if we loose. This way we can know what things are wrong. If to write history only from the words of winners, it won`t be history. It will be like a fantastic story. So citiezens of country have to know all aspects of their country`s history.