A day of the trumpet and alarm against the fenced cities,
&c.] 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" F24; 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, ( Zechariah 10:4 ) .