In 2409, an Allied Starship Creator investigated Lirss Prime's ring for signs of intelligence in its asteroids. The ship came under attack from Hirogen ships. (STO - "Romulan Mystery" mission: "Patrol the Lirss System")
By the 27th century, the planet had been terraformed to class L marginal planet status, and it was one its way to become a class M world. It was part of the Galactic Union, an expansion of the Federation and the Alliance.
On stardate 354184.63, Vorgons from the 27th century but another stardate attacked Kal Dano to steal his Tox Uthat quantum-phase inhibitor. Timot Danlen brought an 25th century AQA starship along to repel the VSV Arbarel and its escorts to save Dano. (STO - "Romulan Mystery" mission: "Vorgon Conclusions")