books.google.co.uk - The Challenger 2 is the current Main Battle Tank of the British Army and represents the culmination of 80 years of tank design. In 1987, its design was presented to the Ministry of Defence in response to a requirement to replace the Chieftain MBT that had been partially superseded by the Challenger 1...http://books.google.co.uk/books/about/Challenger_2_Main_Battle_Tank_1987_2006.html?id=TyhuvbiSyWEC&utm_source=gb-gplus-shareChallenger 2 Main Battle Tank 1987-2006
