Which country is the Phoenix Guerrilla from?

According to the inquiry of Mile Mile app, it is known that the Phoenix Guerrilla is from the United States, and it is a mecha hunter in the American science fiction "Pacific Rim" series released on 20 13, belonging to the fifth generation of mecha. The story of "Pacific Rim" is set in the future of the earth. A group of giant alien creatures constantly invade the earth through a huge wormhole emerging at the bottom of the Pacific Ocean, which has caused a devastating blow to mankind.