When Jesus warned his disciples about "wars" he said nothing about the size, frequency, number of casualties, many nations or few. Neither did he say whether there would be many earthquakes or few, if there would be large earthquakes or small, if there would be many casualties or none.
But he did warn them: he said "beware of deceivers". These would say that Jesus had already returned secretly or that he was in the desert. He told them that these people would say that they were The Anointed (the "Christ").
Doug