Prime Timeline
   | Year | Event | 
   | 1365 | 
         ● [1]
         The battle of Orelious IX takes place, the decisive conflict of the Menthar/Promellian war. Both sides are rendered extinct by the battle. A large asteroid field was left in the aftermath, which the Enterprise-D would explore in 2366. [2]
      
 | 
   | 2366 | 
       ● [2]
         The Enterprise-D investigates the remains of Orelious IX and discovers an intact Promellian battlecruiser. The Starship becomes ensnared in the same booby trap which caught the alien vessel more than a thousand years ago. Geordi La Forge eventually arrives at a method of escape, with the help of a holographic recreation of Leah Brahms, one of the original designers of the Enterprise-D. [2] | 
   
Colour key
● - Shows the canon status and reference of the year for this event
References
| # | Series | Season | Source | Comment | 
| 1 | TNG | 3 | Booby Trap | Said to have happened over one thousand years ago in the episode. This is 1001 years before the episode in 2366. | 
| 2 | TNG | 3 | Booby Trap |  |