The 20th century BC
5 recorded events across 4 years of the 20th century BC, 2000 BC to 1901 BC. 4 of them are dated to a specific year; the rest are recorded only as belonging to the 20th century BC. The largest categories are architecture & engineering (3), people (1) and empires & countries (1).
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Busiest years
Every year in the 20th century BC
Years with no recorded events are omitted. The number is how many events are dated precisely to that year; entries known only to a century or decade are listed on the year page separately.