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The coat of arms of Pennsylvania

Pennsylvania (/ˌpɛnsɪlˈvniə/ PEN-sil-VAY-nee-ə, lit.'Penn's forest'), officially the Commonwealth of Pennsylvania (Pennsylvania Dutch: Pennsylvanie), is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. Pennsylvania borders Delaware to its southeast, Maryland to its south, West Virginia to its southwest, Ohio and the Ohio River to its west, Lake Erie and New York to its north, the Delaware River and New Jersey to its east, and the Canadian province of Ontario to its northwest.

Pennsylvania is the fifth-most populous state in the United States, with over 13 million residents as of the 2020 United States census. The state is the 33rd-largest by area and has the ninth-highest population density among all states. The largest metropolitan statistical area (MSA) is the southeastern Delaware Valley, which includes and surrounds Philadelphia, the state's largest and nation's sixth-most populous city. The second-largest metropolitan area, Greater Pittsburgh, is centered in and around Pittsburgh, the state's second-largest city. The state's subsequent five most populous cities are Allentown, Reading, Erie, Scranton, and Bethlehem. The state capital is Harrisburg.

Pennsylvania's geography is highly diverse. The Appalachian Mountains run through the center of the state; the Allegheny and Pocono mountains span much of Northeastern Pennsylvania; close to 60% of the state is forested. While it has only 140 miles (225 km) of waterfront along Lake Erie and the Delaware River, Pennsylvania has the most navigable rivers of any state in the nation, including the Allegheny, Delaware, Genesee, Ohio, Schuylkill, Susquehanna, and others. (Full article...)

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Photograph by Mathew Brady, 1861

George Brinton McClellan (December 3, 1826 – October 29, 1885) was an American military officer and politician who served as the 24th governor of New Jersey and as Commanding General of the United States Army from November 1861 to March 1862. He was also an engineer, and was chief engineer and vice president of the Illinois Central Railroad, and later president of the Ohio and Mississippi Railroad in 1860.

A West Point graduate, McClellan served with distinction during the Mexican–American War before leaving the United States Army to serve as a railway executive and engineer until the outbreak of the American Civil War in 1861. Early in the conflict, McClellan was appointed to the rank of major general and played an important role in raising the Army of the Potomac, which served in the Eastern Theater. (Full article...)
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View of Johnstown from the Inclined Plane
Johnstown is the largest city in Cambria County, Pennsylvania, United States. The population was 18,411 as of the 2020 census. Located 57 miles (92 km) east of Pittsburgh, it is the principal city of the Johnstown metropolitan area, which is located in Cambria County and had 133,472 residents in 2020. It is also part of the Johnstown–Somerset combined statistical area, which includes both Cambria and Somerset Counties. (Full article...)
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St. Paul Cathedral in the Oakland section of Pittsburgh.

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Pittsburgh in 1902. Lithograph by Thaddeus Mortimer Fowler.

The history of Pittsburgh began with centuries of Native American civilization in the modern Pittsburgh region, known as Jaödeogë’ in the Seneca language. Eventually, European explorers encountered the strategic confluence where the Allegheny and Monongahela Rivers meet to form the Ohio, which leads to the Mississippi River. The area became a battleground when France and Great Britain fought for control in the 1750s. When the British were victorious, the French ceded control of territories east of the Mississippi.

Following American independence in 1783, the village around Fort Pitt continued to grow. The region saw the short-lived Whiskey Rebellion, when farmers rebelled against federal taxes on whiskey. The War of 1812 cut off the supply of British goods, stimulating American manufacture. By 1815, Pittsburgh was producing large quantities of iron, brass, tin, and glass products. By the 1840s, Pittsburgh had grown to be one of the largest cities west of the Allegheny Mountains. Production of steel began in 1875. During the 1877 railway riots it was the site of the most violence and damage in any city affected by the nationwide strikes of that summer. Workers protested against cuts in wages, burning down buildings at the railyards, including 100 train engines and more than 1,000 cars. Forty men were killed, most of them strikers. By 1911, Pittsburgh was producing half the nation's steel. (Full article...)
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The Pennsylvania State University, commonly referred to as Penn State and sometimes by the acronym PSU, is a public state-related land-grant research university with campuses and facilities throughout Pennsylvania. Founded in 1855 as Farmers' High School of Pennsylvania, Penn State was named the state's first land-grant university eight years later, in 1863. Its primary campus, known as Penn State University Park, is located in State College and College Township.

In addition to its land-grant designation, the university is a sea-grant, space-grant, and one of only six sun-grant universities. It is classified among "R1: Doctoral Universities – Very high research activity" and is a member of the Association of American Universities (AAU). The university has two law schools: Penn State Law on the school's University Park campus and Penn State Dickinson Law in Carlisle. The College of Medicine is in Hershey. The university maintains 19 commonwealth campuses and five special mission campuses located across Pennsylvania. (Full article...)

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Pennsylvania's largest city Philadelphia
  • Nickname: The Keystone State
  • Capital: Harrisburg
  • Largest city: Philadelphia
  • Total area: 119,283 square kilometers (46,055 square miles)
  • Population (2000 census): 12,281,054
  • Date admitted to the Union: December 12, 1787 (2nd)
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Mountain laurel, Pennsylvania's state flower

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