[1] Union International Manila foundation is associated with Unión Fenosa which brought in consultants from Spain and South America to the Philippines.

Initially, the club's players held informal football matches at the Jolly Field, a baseball venue inside Meralco's compound.

Unión Fenosa continued to organize games at the Jolly Field and joined various football tournaments including futsal, 7-a-side, and beach soccer competitions.

by September 2000 when it joined the Ateneo Football Tournament, due to most of its players not being affiliated with Unión Fenosa by that time.

Alonso left in December 2005 and was succeeded by Dominic Samson, who became Union's first Filipino head coach.