Mail Call시즌 1 이미지 교체에피소드 번호9The Pilum/WWII Radios/First RocketsOverviewWhat is the secret weapon of the Romans? What kind of radios did they use in WWII? What kind of rockets were first used in combat? Just how did rockets first make their way onto the battlefield?Air dateSeptember 29, 2002Runtime (min)25
