A Romulan-Vulcan War, lasting a hundred years, was at one point waged between Romulans and Vulcans. According to Q, the war was ignited by a misunderstanding triggered by a "self destructive stunt" by Quinn. (VOY: "Death Wish")
The war was not named on-screen. It is unclear when exactly this war happened, and Q's account might even refer to the Time of Awakening. In the first draft script of "Death Wish", the war was said to have been waged between the Romulans and the Klingons, with no mention of the Vulcans having been involved.