Time travel

Time Travel. It happens pretty much all the time in the Course Books. There are numerous other Alternate Timelines either referenced in the main cannon or written of in entirely different stories. Though they try to avoid meddalling, the Saratoga Crew often finds excuses to much about with the timeline.

In the story Virus from The Path to Ascension we see the first incident(in book-order), in which the crew uses two methods of time travel, including a precise technology called CTRL+Z, not to be confused with the story by the same name.

In The Road to War the same technology is used(and introduced) in the story CTRL+Z, which takes place chronologically before Virus in the previous book.

The Concourse to Victory will be the first book to lack an obligatory timetravel story, though it does appear in later volumes of the series.

Ethics

The fact that Hunter and Jason possess precise time travel technology and do not use it on a regular basis says a great deal about their moral standpoint on the subject. It is essentially an "only as a last resort" thing to them, and they try not to prevent major events in history.