totally agree with Sir ID "tdzheng", each towers connected by the wall, at that time, no phones, walkie-talkie, only communication depends on signal of smokes, For instance but might not accurated, black smoke might meaning of large invasion army incoming in order to prepare for the defence. No o...
totally agree with Sir ID "tdzheng", each towers connected by the wall, at that time, no phones, walkie-talkie, only communication depends on signal of smokes, For instance but might not accurated, black smoke might meaning of large invasion army incoming in order to prepare for the defence. No o...