

The Aztecs were one of the great empires of the Americas and came to power through force of arms.

Japan's superbly trained soldiers, the Samurai, lived a life of devotion to honour and loyalty and to betray either required death.

The famous warrior-monks' philosophy blended rigorous military training with religion and technology.

The campaign to conquer paradise required the Hawaiian king Kamehameha to train his warriors for years in the arts of war.