From June 8 to 29, 2009, Lieutenant Chassé-Jean demonstrated valiant service under fire while leading his platoon to defeat the enemy in Afghanistan. Over an extended period, and amidst the chaos and confusion of combat, his fearless conduct in the engagement of a determined enemy, as well as his ability to keep his soldiers composed, were critical to multiple victories in a difficult theatre of operation. Whether leading a frontal assault, controlling the situation while trapped in dangerous positions or directing supporting gunfire, he showed courage and inspirational leadership, which were key to the success of multiple engagements.