The Star Trek The Next Generation #57: The Forgotten War

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!