Star Trek The Next Generation, book 57 : The Forgotten War
William R. Forstchen1999

The legendary Starfleet Captain Lucien Murat, a contemporary of Christopher Pike, disappeared during a battle with the alien Tarn. Now, generations later, Captain Picard is conducting delicate diplomatic negotiations with the Tarn when the Starship Enterprise discovers the descendants of Murat and his crew stranded on a desolate planet, still fighting a war that ended decades ago.

The Human castaways face destruction, but more than these precious lives are at stake. Unless Picard can find a solution, a lost hero's legacy may ignite a new era of interstellar war!