Chris Oxlade 
Inside Tanks and Heavy Artillery 

The earliest tank was designed in the fifteenth century. Since then, tanks have developed into huge, powerful weapons. Get an up-close view of mighty tanks and artillery as you learn about a World War II gun that moved on railroad tracks, how explosive artillery shells work, and what’s inside an armored tank! From ancient trebuchets and battering rams to digital technology on modern artillery, find out how tanks and artillery have changed throughout military history, and experience life on the battlefield.