Wikipedia:Selected anniversaries/March 2
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- 1484 – The College of Arms, one of the few remaining official heraldic authorities in Europe, was incorporated by royal charter in the City of London.
- 1791 – French inventor Claude Chappe and his brothers first demonstrated the semaphore telegraph, a system that conveys information by means of visual signals, using towers (replica pictured) with pivoting crossarms.
- 1901 – U.S. Steel, the first billion-dollar corporation and once the world's largest producer of steel, was founded by financier J. P. Morgan.
- 1943 – World War II: Australian and U.S. air forces attacked and destroyed a large Japanese naval convoy in the Bismarck Sea, north of Papua New Guinea.
- 1995 – Researchers at Fermilab in Illinois announced the discovery of the top quark, the most massive of all observed elementary particles.