16 a day of trumpet and battle cry against the fortified cities and against the corner towers.

Read Zephaniah 1:16 Using Other Translations

A day of the trumpet and alarm against the fenced cities, and against the high towers.
a day of trumpet blast and battle cry against the fortified cities and against the lofty battlements.
a day of trumpet calls and battle cries. Down go the walled cities and the strongest battlements!