For examples of the employment of trumpets in war compare marginal references and 2 Chronicles 20:28. By employment of them was signified the dependence of God’s people on His aid.
Related Commentaries of Numbers 10:9
Numbers 10:9
9 And if ye go to war in your land against the enemy that oppresseth you, then ye shall blow an alarm with the trumpets; and ye shall be remembered before the LORD your God, and ye shall be saved from your enemies.