Treasury of Scripture Knowledge
So the people took victuals in their hand, and their trumpets: and he sent all the rest of Israel every man unto his tent, and retained those three hundred men: and the host of Midian was beneath him in the valley.
In the valley
When he reached Seirah, he blew a trumpet in the Ephraimite hill country. The Israelites went down with him from the hill country, with Ehud in the lead.
"Tell the Israelites, 'In the seventh month, on the first day of the month, you must have a complete rest, a memorial announced by loud horn blasts, a holy assembly.
You must sound loud horn blasts -- in the seventh month, on the tenth day of the month, on the Day of Atonement -- you must sound the horn in your entire land.
If you go to war in your land against an adversary who opposes you, then you must sound an alarm with the trumpets, and you will be remembered before the Lord your God, and you will be saved from your enemies.
Have seven priests carry seven rams' horns in front of the ark. On the seventh day march around the city seven times, while the priests blow the horns.
At that time a large trumpet will be blown, and the ones lost in the land of Assyria will come, as well as the refugees in the land of Egypt. They will worship the Lord on the holy mountain in Jerusalem.
1 Corinthians 15:52
in a moment, in the blinking of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised imperishable, and we will be changed.
In the valley
All the Midianites, Amalekites, and the people from the east assembled. They crossed the Jordan River and camped in the Jezreel Valley.