Tolar'tu was a town located on Qo'noS.
History and specifics[]
The settlement was the historic site of a fierce battle between the Followers of Kahless and the armies of the tyrant Molor. After Kahless the Unforgettable's victory, it became the site of the founding of modern day Klingon civilization. (TNG - The Hand of Kahless novel: Kahless)
Tolar'tu was attacked by the Borg during the invasion in 2381 and eleven million of its inhabitants were killed. (ST - Destiny novel: Lost Souls)