- The Cardassian Union and the Federation sign an affiliation treaty allowing free passage through each of their territories. This treaty is frowned upon by the Klingon Empire.
- A coup occurs on Romulus when the government is overthrown by a Reman named Shinzon. The USS Enterprise is dispatched to meet with the new Praetor, its crew discovers that Shinzon is weaving an elaborate trap. Shinzon is subsequently killed and the Reman leadership is again replaced by Romulans.