Shared ground
Isaiah 20:5–6 describes a public collapse of confidence. People are “dismayed and confounded” because the powers they looked to—Cush (called their “expectation”) and Egypt (called their “glory”)—do not deliver. The “coastland” voice makes the point explicit: these were the places “we fled for help” to be rescued from the king of Assyria, and now that plan has failed.
The text’s focus is not on military details but on what failed reliance does to a community: it produces shame (their celebrated partner becomes a source of embarrassment) and fear (the closing line is an unresolved question: “How shall we escape?”). The repeated “expectation” language (see expectation) underlines that their hope was not vague; it was a chosen strategy.
Where interpretation differs (only where needed)
Two main identification questions are debated.
First, who are “they” that become dismayed? Some read it primarily as Judah (or a pro-Egypt faction within Judah) learning that Egypt/Cush cannot protect them. Others read it more broadly as the western coastal peoples involved in or tempted by an anti-Assyrian coalition.
Second, what is “this coastland”? Some take it as the Philistine coastal region (near the Ashdod setting earlier in the chapter). Others treat “coastland” as a wider label for Mediterranean borderlands generally, including Judah’s neighborhood.
Why the disagreement exists
The passage does not name Judah, Philistia, or a specific city in vv. 5–6. It uses broad geographic language (“coastland”) and a representative speaker (“the inhabitant of this coastland”), which can point either to a specific nearby region (given Isaiah 20’s setting) or to a wider set of peoples who shared the same political hope.
What this passage clearly contributes
Explicitly, the passage teaches that political “hope” can be exposed as false when events reveal the weakness of the trusted partner. It also shows how such misplaced confidence spreads: not only the ally is shamed; the ones who boasted in that ally share the disgrace. By ending with “How shall we escape?”, the text leaves the crisis hanging, pushing the reader back to Isaiah’s larger message that human alliances are not a secure refuge (a theme developed repeatedly across Isaiah, even when not stated here).