Era
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1861-1867
18
Since 2000
18
1830-1915
17
1832-1867
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1946-
17
ca. 1480-1520
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1834-1902
15
Caste War, 1847-1855
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Punitive Expedition into Mexico, 1916
15
Since 1970
15
War with Mexico, 1845-1848
15
2010
14
1700-1899
13
1806-1872
13
1900 - 1999
13
Revolution, 1835-1836
13
Since 1810
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Since 1918
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approximately 1480-1520
12
1810-1861
11
1861-1865
11
1957-
11
Tertiary
11
1600-1699
10
1651-1695
10
1783-1824
10
1794?-1876
10
1848-1950
10
1879-1919
10
1900-2099
10
1914-1998
10
1980-
10
Cretaceous
10
Republic, 1836-1846
10
Siglo XIX
10
1846-1848
9
1859-1920
9
Siglo XXI
9
1500-1699
8
1846-1950
8
1856-1924
8
1877-1945
8
1910-1970
8
1945-
8
Since 1900
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Since 1988
8
1511-1564
7
1840-1927
7
1867-1946
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1991-2000
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