Prime Timeline
   | Year | Event | 
   | 2295 | 
         ● [1]
         A plasma plague breaks out on the planet Obi VI. [1]
 | 
   | 2365 | 
       ● [2]
         The Enterprise-D undergoes some changes to the senior staff; Doctor Beverly Crusher accepts a position as Chief of Starfleet Medical, with Doctor Pulaski replacing her on the Enterprise. Geordi La Forge is promoted to Chief Engineer. [2] 
         ● [2]
         The Enterprise-D encounters an energy being which, seeking to learn about corporeal life, impregnates Deanna Troi. She gives birth to a son, Ian Andrew, just hours later. Ian sacrifices his life and returns to non-corporeal existence when it is discovered that his presence is causing plasma plagues being transported by the ship to become active. [2]
      
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Colour key
● - Shows the canon status and reference of the year for this event
References