Examlex
As of 2010, per capita GDP in the United States was approximately
Thirteenth Amendment
Constitutional amendment adopted in 1865 that irrevocably abolished slavery throughout the United States.
Ironclad Ships
Warships in the 19th century that were covered with iron or steel armor plates, making them resistant to cannon fire and changing naval warfare.
Steam Locomotives
Engines powered by steam that are used to pull trains on railway tracks, significant in the 19th and early 20th centuries.
Battle Sites
Geographic locations where military conflicts have taken place. These areas are often marked for their historical and educational value.
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