Pictured: ShieldWall Network Coordinator Billy Roper From The ShieldWall Network website. The ShieldWall began in classical Greek civilization, when the courageous Spartans and other Greek warriors, such as Leonidas and his 300 at Thermopylae, linked their shields together against the invaders. It is in honor of them that the Spartan lambda shield is the symbol … Continue reading What is the ShieldWall Network?