After the US colonized the Philippines the Catholic Church was disestablished, and was no longer the official religion. When that happened there was a large influx of Protestant missionaries of all denominations to the Philippines. Today, Protestants make up around 10% of the total population in the Philippines, with about 9 million people. While Protestantism was introduced to the Philippines during the period of US colonialism, it wasn't necessarily due to a push from the US government. It really was due more to missionaries acting opportunistically after the disestablishment of the Catholic Church.