Which of these well-known companies began as a military contractor during World War I manufacturing aircraft engines before becoming famous for its luxury automobiles?

Throughout military history, certain brands have become synonymous with warfare and military equipment. These companies have shaped the outcome of conflicts and sometimes evolved from military suppliers into household names. This trivia challenge tests your knowledge of the fascinating intersection between commercial brands and military history. Do you know which companies armed the world's greatest armies?

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Rolls-Royce
Mercedes-Benz
Ferrari
Jaguar