Determining the “biggest” empire depends on how one defines and measures “bigness.” Here are a few options:
- Land area: If we’re talking about the empire with the largest land area, then the answer would be the British Empire at its peak in the early 20th century. At its height, the British Empire spanned approximately 33 million square kilometers (12.7 million square miles) and controlled around a quarter of the world’s land area.
- Population: If we’re talking about the empire with the largest population, then the answer would be the Mongol Empire, which at its height in the late 13th century, is estimated to have had a population of around 100 million people.

- Duration: If we’re talking about the empire that lasted the longest, then the answer would be the Byzantine Empire, which lasted for over 1,000 years, from 330 AD to 1453 AD.
- Military might: If we’re talking about the empire with the strongest military, then the answer would be subjective, but one possibility could be the Roman Empire at its height, which had a highly organized and disciplined military that allowed it to conquer and control a vast territory.
It’s worth noting that there have been many empires throughout history, and each has its own unique characteristics and achievements.
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Which empire is biggest?