Challenger References Images Challenger British tank Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: tank/ Gun calibreThe British Challenger, introduced in the 1980s, was also armed with 120-mm guns, but these were still of the rifle type. Read MoreThe British Challenger, introduced in the 1980s, was also armed with 120-mm guns, but these were still of the rifle type. Read More