In 2004, four years after being refounded, La Unión first reached Tercera División, finishing twice in the top four over the course of seven seasons, but consecutively falling short in the promotion playoffs. In July 2009, it became FC Cartagena's reserve team.[1][2]
Before the 2011–12 season started, the relationship between Cartagena and La Unión came to an end.[3]
Club background
Club Deportivo La Unión — (1941–56; 1965–75; 2000–09; 2011)
Deportivo Unionense Educación y Descanso — (1956–65)