Statistics for 30 Largest Empires Ever

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Year Of Maximum Territorial Extent	Maximum Size (Square Kilometers)	Empire	% Correct
1920	35,500,000	British Empire	100%
1920	11,500,000	Second French Empire	98%
1270 or 1309	24,000,000	Mongol Empire	91%
117	5,000,000	Roman Empire	89%
1683	5,200,000	Ottoman Empire	86%
1942	8,510,000	Empire of Japan	81%
1820	5,500,000	Second Portuguese Empire	81%
1895	22,800,000	Russian Empire	58%
1810	13,700,000	Spanish Empire	53%
1790 or 1820	13,430,000	Qing Dynasty	47%
1889	8,337,000	Empire of Brazil	46%
323 BC	5,200,000	Macedonian Empire	46%
1450	6,500,000	Ming Dynasty	39%
1821	4,429,000	First Mexican Empire	35%
720	11,100,000	Umayyad Caliphate	33%
750	11,100,000	Abbasid Caliphate	26%
1310 or 1330	12,360,000	Yuan Dynasty	25%
1310	6,000,000	Golden Horde Khanate	21%
669 or 715	8,080,000	Tang Dynasty	21%
800	4,600,000	Tibetan Empire	18%
1405	4,400,000	Timurid Empire	18%
1640	7,100,000	Iberian Union	14%
500 BC	5,500,000	Achaemenid Empire	12%
50 BC	6,000,000	Western Han Dynasty	12%
176 BC	9,000,000	Xiongnu Empire	12%
100	6,500,000	Eastern Han Dynasty	11%
969	4,100,000	Fatimid Caliphate	11%
557	6,000,000	Gokturk Khaganate	11%
655	6,400,000	Rashidun Caliphate	11%
624	4,000,000	Eastern Turkic Khaganate	4%