Roger Finnigan, director and producer of Warrior Weapons, Battlefield Mobility answers questions about the film.

From the phalanx to the new NLOS in development, take a look at military breakthroughs and technological innovations of ground warfare.

James Millar, director/producer of Firepower and Command and Control answers questions about the films.

Find out the history of the first ballistic missile and what impacts smokeless gunpowder had on infantry and artillery.

Episode 1 traces the evolution of soldiers and their gear.

Episode 2 explores mobility on the battlefield, and the never-ending challenge to maximize effectiveness and find the right balance of protective armor, speed, mobility and firepower.

Episode 3 tracks the development of artillery from the ancient Greeks, through the invention of gunpowder in China, to the very latest generation of big guns and directed-energy weapons.

Episode 4 considers the ways in which armies have used or modified the terrain of the battlefield to their advantage for both defense and attack.