The Tegian Zone  

Star Trek: Enterprise (or Enterprise as it was known for it's first 2 seasons) began with much fanfare on September 26, 2001.  It was sadly put to rest on May 26, 2005, due to low ratings.  However, many of the elements of the series have continued and expanded through the Star Trek: Enterprise paperback novels.  These novels bridge the gap between "Terra Prime" and "These are the Voyages..." including the precursors of the Romulan war.  It also establishes many things that are referenced in later series, such as the Kobyashi Maru from Star Trek II.