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1803

Louisiana Purchase

1803

Marbury v. Madison

1823

Monroe Doctrine

1848

Treaty of Guadalupe Hidalgo

1857

Dred Scott v. Sanford

1862

Homestread Act

1863

Emancipation Proclamation

1863

Gettysburg Address

1865

The 13th Amendment

1868

Puchase of Alaska

1868

14th Amendment

1870

15th Amendment

1880

Thomas Edison's Patent

1882

Chinese Exclusion Act

1896

Pessy v. Ferguson

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