Joel compares their appearance to horses and says they run like horsemen. He describes their movement as fast and relentless. See Joel 2:4.
Joel 2:4–9 pictures an invading force as fast, loud, and disciplined. It looks and moves like cavalry and chariots, sounding like fire consuming dry grass. Its arrival spreads panic; faces turn pale. The force advances in tight formation, not bumping or breaking lines, and it cannot be stopped by defenses. This unit continues the alarm and warning that begins in the larger scene of Joel 2:1–11, where an approaching “day” is portrayed through vivid, escalating images.
Joel 2:4–9 presents an advancing force as fast, loud, coordinated, and effectively unstoppable. The text piles up “like” comparisons (horses, chariots, fire) to make the audience picture and hear the approach, then shifts to the human effect: whole communities panic and faces go pale (verse 6).
A good comparison lets each passage speak in its own setting before drawing a theological conclusion. That keeps application from flattening the text.
Start with Joel 2:4, then read the surrounding section so the answer stays connected to the passage's flow.
4The appearance of them is as the appearance of horses, And as horsemen, so do they run.