Try to wrap your mind around this. Yahweh tells you to go take over a group of hostile nations. There are a gang of Kings who have it out for you and they have been preparing to take you on for quite some time. They’ve summoned the favor of their gods to come against you and have amassed a great army. Then Yahweh casually instructs you to take with you only 12,000 men. Don’t worry, your decisive victory has been prophesied. Oh, and when you get back from the war, pay attention to the greatest miracle of the entire campaign!