Countries leave most of the pieces of history out because they dont want to make it seem as if they have failed. It is important to let others know the truth and what really happened. We should not be lied to or not told the whole truth. People may not see there losses of wars as bad things or there mistakes as a fail. People can learn from the past mistakes and overcome them or just take a different approach. Everyone is different and may feel a certain way. Countries should not leave any piece of their history out, it is important to know everything that happened in past history.