Their infants will be dashed to pieces before their eyes;
their houses will be looted and their wives violated.
See, I will stir up against them the Medes,
who do not care for silver
and have no delight in gold.
The oracle against Babylon is interrupted in Isaiah 14:1-2 with a prose interlude promising the return of Israel (meaning Judah?). Verses 3-23 depict Israel mocking the defeated Babylonians.
All of them will speak
and say to you:
"You too have become as weak as we!
You have become like us!"
Your pomp is brought down to Sheol,
and the sound of your harps;
maggots are the bed beneath you,
and worms are your covering.
In context, verses 12-20 are clearly about the king of Babylon. Taken out of context they have become the basis for the legend that Satan was a rebellious angel named Lucifer ("morning star," verse 12) who was cast out of heaven. John Milton wrote a great poem about it, but the text in no way supports this interpretation.
The Assyrians, who defeated the northern kingdom, get a short oracle in 14:24-27. YHWH is going to put a smack-down on them.
The Philistines are going to get a comeuppance too according to an oracle dated to the year of King Ahaz's death (Isaiah 14:28-32).
In Isaiah 15:1-16:14 Moab gets a longer oracle replete with the names of devestated cities.
Isaiah 17:1-7 prophecies the downfall of Syria's capitol city, Damascus. Verses 8-11 chide the Judahites for their syncretistic worship of foreign gods. And verses 12-14 wag a prophetic finger at Judah's enemies in general.
I found Blake's illustration of Lucifer for Milton's epic poem Paradise Lost at wiki.
Next: Isaiah 18-22