The events happened, negative or not.

No I do not think countries should leave pieces of their history out, even if they are negative,while documenting the stories. I think that it is important to allow the people of the country to know EVERYTHING that has happened, this is important so history may not repeat itself. For example, if a country lost a war, as embarrassing as that is, it is important to document everything that happened so that in the future if the country were to be in a war again they may take different steps or a different approach to attacking the enemy to prevent another loss from occurring. It is also important to allow the negatives to be written in the history books so we may look at it as "wow, that was a really cruel thing for our country to have done" and realize maybe how much our society has changed for the better, or maybe not even changed at all but to motivate the current citizens to better themselves and the country.