The side was founded in September 2025 ahead of beginning competition in the
2026 Super Rugby Americas season as the fourth Argentine province after
Pampas XV (representing then
Buenos Aires region),
Dogos XV (representing the
Córdoba region) and
Tarucas (representing the
Tucumán Province). In November 2025, it was confirmed that former
Cafeteros Pro and
Dogos XV coach
Nicolás Galatro would coach the franchise in 2026. One of Union member is
Unión de Rugby de Rosario which won the
Campeonato Argentino 1 time in 1965. ==Stadium==