Corporal Rachynski was deployed with 9 Platoon, C Company, 1st Battalion, Princess Patricia's Canadian Light Infantry Battle Group during Operation ARCHER. On May 29, 2006, while employed as the air sentry in a light armoured vehicle, a determined enemy ambushed his convoy using rocket-propelled grenades, as well as small arms and machine gun fire. Since the close proximity of the enemy precluded the use of the light armoured vehicle’s main armament, Corporal Rachynski stood exposed in the air sentry hatch and maintained a constant rate of fire, despite his vehicle being struck repeatedly by grenades and small arms fire. His generous actions contributed to the suppression of the enemy fire and enabled the convoy to escape the ambush.