A day of the trumpet and alarm against the fenced cities,.... The trumpet of the enemy, sounding the alarm of war against the fenced cities of Judea, which were taken before Jerusalem; calling and gathering the soldiers together, and animating them to the assault of them; and blowing them in a way of triumph; and as expressive of victory, having got possession of them:
and against the high towers; or "corners" x; towers being usually built corner-wise, and full of corners, and on the corners of walls of cities; sometimes these signify princes, magistrates, and great men,
x פנות "pinnas", Montanus, Castalio; "angulos", Junius & Tremellius, Burkius.