Star Trek: Enterprise: Season 2, Episode 15

2 - 15: Cease Fire

Both the Vulcans and the Andorians claim the planetoid Weytahn (or Paan Mokar, as Vulcans call it) in an age-old feud and military conflict erupts again. As the fighting goes on, the Vulcans are willing to discuss cease-fire terms represented by Ambassador Soval. However, Imperial Guard officer Shran believes only Captain Archer can be trusted to mediate the bloody dispute, which drags the Enterprise crew into the tense situation.