Davao in Mindanao had a large population of Japanese immigrants who acted as a fifth column, welcoming the Japanese invaders during World War II. These Japanese were disliked by the Chinese and hated by the Moros. The Moros were judged as "fully capable of dealing with Japanese fifth columnists and invaders alike." The Moros were to fight the Japanese invaders when they landed at Davao on Mindanao. The Japanese went back to their ships at night to sleep since the Moros struck so much fear into them, even though the Moros were outnumbered by the Japanese.