I do not see how it is possible, in all this part of Isaiah, from chapter 13 and even before, not to see that the Spirit of God is taking up the great plan of God, and speaking of future coming events, but taking hold of present ones as an occasion, and that connected with the government of God then, which will be fully displayed at the end.
Note Damascus was taken by the king of Assyria in the reign of Ahaz; but all this is evidently in the latter days. Moab, however, suffers first from the heathen.