For conspicuous gallantry and intrepidity at the risk of his life above and beyond the call of duty while serving with Company F, in action against enemy aggressor forces. While accompanying a patrol en route to occupy a combat outpost forward of friendly lines, Pfc. Simanek exhibited a high degree of courage and a resolute spirit of self-sacrifice in protecting the lives of his fellow marines. With his unit ambushed by an intense concentration of enemy mortar and small-arms fire, and suffering heavy casualties, he was forced to seek cover with the remaining members of the patrol in a nearby trench line. Determined to save his comrades when a hostile grenade was hurled into their midst, he unhesitatingly threw himself on the deadly missile absorbing the shattering violence of the exploding charge in his body and shielding his fellow marines from serious injury or death. Gravely wounded as a result of his heroic action, Pfc. Simanek, by his daring initiative and great personal valor in the face of almost certain death, served to inspire all who observed him and upheld the highest traditions of the U.S. Naval Service.