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When to date the start of the history of the United States is debated among historians. Older textbooks started with the arrival of Christopher Columbus in 1492 and emphasized the European background ...

Army of Tennessee

Militaryunit

Army of Tennessee

The Army of Tennessee was the principal Confederate army operating between the Appalachian Mountains and the Mississippi River during the American Civil War. It was formed in late 1862 and fought unti ...

Schuylkill River

The Schuylkill River (/ˈskuːkəl/ SKOO-kəl) is a river in Pennsylvania, that William Penn chose in 1682 as one bank of the confluence upon which he founded the planned city of Philadelphia on lands pur ...

Orange County, New York

Wikipedia Article

Orange County, New York

Orange County is a county located in the U.S. state of New York. As of the 2010 census, the population was 372,813. The county seat is Goshen. The county was named in honor of William III of Orange, w ...

Quartzite

Definition

Quartzite

Quartzite is a hard, non-foliated metamorphic rock which was originally sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within oro ...

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