The Challenger 1 Main Battle Tank was Great Britain's second purpose-designed Main Battle Tank and served as the spear point of the Royal Armored Corps for nearly 20 years. The Challenger 1 proved to be an excellent combat vehicle in Operation Granby after a controversial early career in the British Army, and it continues to serve the Jordanian army to the present day. Robert Griffin tells the story of the Challenger 1's development and service, in this first volume of a two part study for the Kagero Photosniper series.