 The Nabataean scouts spotted the marching enemy and used smoke signals to warn of the approaching Antigonid army.The Nabataeans dispersed their herds and possessions to guarded locations in harsh terrain - such as deserts and mountain tops - which would be difficult for the Antigonids to attack, and garrisoned "the rock" to defend what remained.The Antigonids attacked "the rock" through its "single artificial approach", but the Nabataeans managed to repulse the invading force.