Numbers 10:9 states
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.
How has this verse been understood by the author(s) and by the audience to which it was written to? How exactly are the Israelite's to be remembered by the Lord through blowing their trumpets when going out to war, and how are they supposed to serve as a reminder? Also do we find anything like this (the use of trumpets in order to arouse the mercy of their gods) in other ANE cultures?
I'm looking for any scholarly sources that may shed light on these verses and ancient Israelite custom/ritual.
P.s. I'm aware that the trumpets had other uses like signaling the elders to assemble or for the people to move from one place to another, however i'm only interested in understanding verse 9 where it states that the trumpets were used during war.
Note that according to the Bible (Numbers 31:6; Joshua chapter 6. However in Joshua only the Shofar is mentioned) the trumpets have indeed been used by the Israelite's in war, so this is not purely theoretical.