This is the term that is used to describe a particular document that tells us of the trail of events that have occurred in the past. That is the events that have the timeline of having happened over a long period of time.
They are most valid when the event is being talked about by a person that has first hand knowledge of what happened instead of telling stories of what they heard.
The major issues that Bush faced while President included the tension and conflict in the Middle East as well as what to do with the dissolved Soviet Union.