However, to suggest that Islam spread within Western Java as an entirely peaceful process is inaccurate as the capture of Banten Girang, Kalapa, and later Pajajaran of Sunda Kingdom was achieved by military means. It was said that the Sundanese prisoners were spared only if they converted to Islam. Nevertheless, the kings of Banten demonstrated their tolerance by not interfering and forcing the native inlanders Baduy people to convert to Islam, thus allowing these former Sundanese subjects to retain their ancient faith and way of life up until today. The sovereign of Banten was known to keep a regiment of bodyguard consisting of these non-Muslim "highlanders" mercenaries. The kings of Banten also allowed the construction of Chinese folk temples and Christian churches for merchants.