Take an in-depth tour of duty that explores the armor and weapons that have made a foot soldier's job possible throughout the ages. From battle armor to bubble gum, you might be surprised by what soldiers have carried into battle. See what they'll be carrying in future wars. Discover how weapons and equipment are developed - from the gladius of Ancient Rome to today's M16 assault rifles, infrared scopes, and biological-weapons protection. See how body armor has evolved from medieval times, through WWI and WWII, to the technological innovations that shield today's land warriors.