The Treaty of 2097 was a treaty enforced by the Vulcans supporting their claim on the planet Paan Mokar, after having made their claim on the planet in 2097. This treaty was established nearly forty years after the Andorians made their claim on the planet.
Following the Andorian invasion of the planet in 2152, the Vulcans naturally attempted to enforce the Treaty of 2097 in attempt to regain control of the colony. In the attack, two dozen Vulcans were wounded and three were taken hostage. (ENT: "Cease Fire")