From ebgames.com:

Army Men: Sarge's War follows the exploits of Sarge, now an army of one. The Tan Army has unleashed a weapon of unimaginable destruction on the Green Army, reducing Sarge's platoon to a pile of melted plastic. Players will take control of Sarge as he goes renegade to avenge the death of his squad. Army Men: Sarge's War is harder edged than previous Sarge's Heroes titles, with more emphasis on combat tactics, advanced AI, thrilling destruction effects, and fast-paced, action-packed firefights.