In 1609, the temporary peace established by Sho Shin was violently overthrown when the powerful Shimazu clan of Satsuma invaded and conquered Okinawa. The Shimazu lords placed a new weapons ban, leaving the Okinawans defenseless against samurai weaponry. In an attempt to protect themselves, the people of Okinawa looked to simple farming implements, which the samurai would not be able to confiscate, as new methods of defense. This use of weapons developed into kobudo, or "ancient martial way" as known today.