9th century
The 9th century was defined by the calendar of Earth as occurring from the year 801 through the year 900.

Events 
Kahless the Unforgettable unites the Klingon people after his defeat of the tyrant Molor and the Fek'Ihri. Kahless establishes a strict warrior code that is passed down through Klingon culture to the present day. (; )
A ferocious war breaks out on Solais V. The conflict lasts until the 24th century, at which point both sides are nearly wiped out. ()
 According to Timicin, in either this century or the 4th century, there is no Resolution on Kaelon II. ()

External links 
 
 

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