That was also in the Europe too, both before Romans and of course also in their times. Current time Romania's Transylvania for example (Dacia in the Roman's tim

That was also in the Europe too, both before Romans and of course also in their times. Current time Romania's Transylvania for example (Dacia in the Roman's time), is one of the places that was situated at the edge of the Roman Empire. Because of the risk of eastern invasions (migration from east happened all the time), it had an efficient system of fire/smoke outposts signaling the presence of possible enemies over Carpathians, long outside the Roman territory.