Green Valley is a census-designated place (CDP) in southern Frederick County, Maryland, United States.
Population: 12,262
Latitude: 39° 18' 33.37" N
Longitude: -77° 17' 49.96" W
The National Security Agency (NSA) is an intelligence organization of the United States government, responsible for global monitoring, collection, and processing of information and data for foreign intelligence and counterintelligence purposes - a d…
The Battle of Antietam /ænˈtiːtəm/, also known as the Battle of Sharpsburg, particularly in the South, fought on September 17, 1862, near Sharpsburg, Maryland, and Antietam Creek as part of the Maryland Campaign, was the first major battle in the Am…
A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or sometimes both…
John Brown's raid on Harpers Ferry (also known as John Brown's raid or The raid on Harpers Ferry; in many books the town is called "Harper's Ferry") was an attempt by the white abolitionist John Brown to start an armed slave revolt in 1859 by seizin…
Benjamin Banneker (November 9, 1731 – October 9, 1806) was a free African American scientist, surveyor, almanac author and farmer. Born in Baltimore County, Maryland, to a free African American woman and a former slave, Banneker had little formal ed…
Montgomery County is a county in the U.S. state of Maryland. As of the 2010 census, the population was 971,777, and a 2013 estimate put the population at 1,016,677. It is the most populous county in Maryland.
Columbia is a planned community comprising 10 self-contained villages, located in Howard County, Maryland—the second wealthiest county in the United States, according to 2013 U.S. Census Bureau figures. It began with the idea that a city could enhan…
Harpers Ferry is a historic town in Jefferson County, West Virginia, United States. It was formerly Harper's Ferry with an apostrophe and that form continues to appear in some references. It is situated at the confluence of the Potomac and Shenandoa…
Frederick is a city and the county seat of Frederick County in the State of Maryland. Frederick has been an important crossroads community since it was located in colonial times at the intersection of an important north–south Indian trail, and east–…
Loudoun County (/ˈlaʊdən/ LOWD-ən) is a county located in the Commonwealth of Virginia. In 2014, the population was estimated to be 361,708, making it the third-most populous county in Virginia. Loudoun's county seat is Leesburg.
Howard County is a county located in the central part of the U.S. state of Maryland.
Dominion Resources, Inc., commonly referred to as Dominion, is a power and energy company headquartered in Richmond, Virginia that supplies electricity in parts of Virginia and North Carolina and supplies natural gas to parts of West Virginia, Ohio,…
Laurel is a city in northern Prince George's County, Maryland, in the United States, located midway between Washington, D.C., and Baltimore on the Patuxent River. Founded as a mill town in the early 19th century, the arrival of the Baltimore & Ohio …
Leesburg is a historic town within and the county seat of Loudoun County, Virginia. Leesburg is located 33 miles (53 km) west-northwest of Washington, D.C. along the base of Catoctin Mountain and adjacent to the Potomac River.
Germantown is an urbanized census-designated place in Montgomery County, Maryland. With a population of 90,676 as of 2013 U.S. Census Bureau estimates, Germantown is the third most populous place in Maryland, after the city of Baltimore, and the cen…
Ellicott City is an unincorporated community and census-designated place, along with being the county seat of local government in Howard County, Maryland, United States. It is part of the Baltimore–Washington Metropolitan Area. The population was 65…
Fort Meade is a census-designated place (CDP) in Anne Arundel County, Maryland, United States. The population was 9,327 at the 2010 census. It is the home to the National Security Agency and the Defense Information Systems Agency, which are located …
Fort Detrick /ˈdiːtrɪk/ is a United States Army Medical Command installation located in Frederick, Maryland.