Today my guest is Sergeant Major Donald Reynolds, former 0331 Machine Gunner, 0369 Infantry Unit Leader, and 8999 SgtMaj. He's known to many on Instagram as @norseman_9 where he posts some of the best and most encouraging insights on both infantry training and combat leadership. SgtMaj Reynolds has set the standard for using social media as a leadership tool. His Moments in Leadership are not to be missed .