What Happened in Okhud?

A third of the army planned on joining them, and then turned their back. So it would demoralize the military right before they go into battle. They could have just not come along to begin with,. but they waited until the last minute. If you walk away from a battlefield today, what is going to happen to those soldiers? The Prophet was almost killed in Urd; even an arrows reportedly pierced through his jaw.