Book excerpt: The platoon leader and platoon sergeant are two of the most important leaders in the U.S. Army. The way platoon leaders and sergeants work together as a team can cause the success or failure of companies, battalions, brigades, and divisions. They represent the leading edge of leadership on and off the battlefield. On the battlefield, platoon leaders and sergeants build their platoons, empower squad leaders, integrate outside elements, and use troop-leading procedures to plan and lead. Off the battlefield, platoon leaders and sergeants prepare their platoon for combat through tough training. The platoon leader and platoon sergeant's ability to coach, teach, and mentor their Soldiers leads directly to the readiness of our formations. World-wide, platoon leaders and sergeants are personally leading the U.S. Army at the lowest level. This handbook is a guide for new leaders to help prepare them for a critical crucible of leadership that will determine the U.S. Army's ability to fight and win our country's wars.