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Alternate Joint Communications Center
The Raven Rock Mountain Complex (RRMC), also known as Site R, is a U.S. military installation with an underground nuclear bunker near Blue Ridge Summit, Pennsylvania, at Raven Rock Mountain that has been called an "underground Pentagon". The bunker has emergency operations centers for the United States Army, Navy, Air Force and Marine Corps. Along with Mount Weather Emergency Operations Center in Virginia and the Cheyenne Mountain Complex in Colorado, it formed the core bunker complexes for the US continuity of government plan during the Cold War to survive a nuclear attack. Description The installation's largest tenant unit is the Defense Threat Reduction Agency, and RRMC communications are the responsibility of the 114th Signal Battalion. The facility has 38 communications systems, and the Defense Information Systems Agency provides computer services at the complex. History Raven Rock Mountain is adjacent to Jacks Mountain on the north while Miney Branch flows west-to-e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mason–Dixon Line
The Mason–Dixon line, also called the Mason and Dixon line or Mason's and Dixon's line, is a demarcation line separating four U.S. states, forming part of the borders of Pennsylvania, Maryland, Delaware, and West Virginia (part of Virginia until 1863). It was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon as part of the resolution of a border dispute involving Maryland, Pennsylvania, and Delaware in colonial America. The dispute had its origins almost a century earlier in the somewhat confusing proprietary grants by King Charles I to Lord Baltimore (Maryland) and by King Charles II to William Penn (Pennsylvania and Delaware). The largest, east-west portion of the Mason–Dixon line along the southern Pennsylvania border later became known, informally, as the boundary between the Southern slave states and Northern free states. This usage came to prominence during the debate around the Missouri Compromise of 1820, when drawing boundaries between slave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Federal Government Continuity Of Operations
Continuity of Operations (COOP) is a United States federal government initiative, required by U.S. Presidential Policy Directive 40 (PPD-40), to ensure that agencies are able to continue performance of essential functions under a broad range of circumstances. PPD-40 specifies certain requirements for continuity plan development, including the requirement that all federal executive branch departments and agencies develop an integrated, overlapping continuity capability, that supports the eight National Essential Functions (NEFs) described in the document. The Federal Emergency Management Agency provides guidance to the private sector for business continuity planning purposes. A continuity plan is essential to help identify critical functions and develop preventative measures to continue functions should disruption occur. History A Continuity of Operations Plan (or Continuity of Government Plan) has been a part of U.S. government operations since President Dwight D. Eisenhower pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greencastle, PA
Greencastle is a borough in Franklin County in south-central Pennsylvania, United States. The population was 3,996 at the 2010 census. Greencastle lies within the Cumberland Valley of Pennsylvania. History James Patton, who came to America at age 17 and moved to North Carolina in 1793, started the settlement of Canogege (spelled "Conegoge" by George P. Donahoo). Patton said in an 1839 letter to his descendants that the place was "settled by a moral and orderly people." Greencastle was founded in 1783 by John Allison from the Barkdoll House. The town was named after Greencastle, County Donegal, Ireland. It was originally composed of 246 lots. By 1790 there were about 60 houses in Greencastle, homes to approximately 400 people. The town of Greencastle had grown by the mid-nineteenth century to 1,125 residents. Latter Day Saint settlement In 1845, following the succession crisis in the Latter Day Saint movement, Sidney Rigdon (one of the three main contenders along with James Str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavalry Corps, Army Of Northern Virginia
The Cavalry Corps of the Army of Northern Virginia was an organized unit of cavalry in the Confederate Army during the American Civil War. Starting out as a brigade in late 1861, becoming a division in 1862 and finally a Corps in 1863; it served in the Eastern Theater until the ANV's surrender in April 1865. Formation and development under Maj. Gen. J.E.B. Stuart The rise of the ANV's Cavalry can be almost entirely tied to the career and organizational efforts of its first commander, Maj. Gen. J.E.B. Stuart. During summer 1861, before the Army of Northern Virginia was formed, the confederate cavalry in the Eastern Theater was limited to regiments or smaller units attached to districts or larger formations. Noteworthy were Stuart's 1st Virginia Cavalry, the 30th Virginia Cavalry and Hampton's Legion from South Carolina. Recommendations and endorsements from Generals P.G.T. Beauregard, Joseph E. Johnston and James Longstreet led to a promotion to brigadier general for Stuart ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Of Gettysburg
The Battle of Gettysburg () was fought July 1–3, 1863, in and around the town of Gettysburg, Pennsylvania, by Union and Confederate forces during the American Civil War. In the battle, Union Major General George Meade's Army of the Potomac defeated attacks by Confederate General Robert E. Lee's Army of Northern Virginia, halting Lee's invasion of the North. The battle involved the largest number of casualties of the entire war and is often described as the war's turning point due to the Union's decisive victory and concurrence with the Siege of Vicksburg.Rawley, p. 147; Sauers, p. 827; Gallagher, ''Lee and His Army'', p. 83; McPherson, p. 665; Eicher, p. 550. Gallagher and McPherson cite the combination of Gettysburg and Vicksburg as the turning point. Eicher uses the arguably related expression, " High-water mark of the Confederacy". After his success at Chancellorsville in Virginia in May 1863, Lee led his army through the Shenandoah Valley to begin his second ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fight At Monterey Gap
The Fight at Monterey Pass (or Gap) was an American Civil War military engagement beginning the evening of July 4, 1863, during the Retreat from Gettysburg. A Confederate wagon train of Lt. Gen. Richard S. Ewell's Second Corps, Army of Northern Virginia, withdrew after the Battle of Gettysburg, and Union cavalry under Brig. Gen. H. Judson Kilpatrick attacked the retreating Confederate column. After a lengthy delay in which a small detachment of Maryland cavalrymen delayed Kilpatrick's division, the Union cavalrymen captured numerous Confederate prisoners and destroyed hundreds of wagons. Background General Robert E. Lee ordered his Confederate Army of Northern Virginia to begin withdrawing from Gettysburg following his army's defeat on July 3, 1863. When Maj. Gen. George G. Meade's Army of the Potomac did not counterattack by the evening of July 4, Lee realized that he could accomplish nothing more in his Gettysburg Campaign and that he had to return his battered army to Virgin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nichol's Gap Road
The Nichol's Gap Road was a central Pennsylvania highway established in the 18th century near Maryland, extending westward from the Black's Gap Road "just west of Little Conewago Creek" at the '' Crofs Keys'' stand of James Black. The road went past both the Rock Creek Church and the 1761 Samuel Gettys tavern where Gettysburg would be surveyed in 1786. The highway was built over South Mountain (Maryland and Pennsylvania) via Nichol's Gap () and down the Devils Racecourse into the Cumberland Valley, allowing access to Hagerstown, Maryland. Called the "Hagerstown Road" during the Battle of Gettysburg, parts of the road are now designated (east-to-west): U.S. Route 30, Pennsylvania Route 116 (Fairfield Road to Fairfield, Pennsylvania), Iron Springs Road, Gum Springs Road, and Old Route 16. (The summit section through Nichol's Gap—"Fairfield Gap" during the Civil War—no longer has a roadway.) History The Nichol's Gap Road was established westward by a Commonwealth of Pennsylvania ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Route 16
Pennsylvania Route 16 (PA 16) is a east–west state route located in southern Pennsylvania, United States. The western terminus of the route is at U.S. Route 522 (US 522) in McConnellsburg. The eastern terminus is at the Mason–Dixon line in Liberty Township, where the road continues into Maryland as Maryland Route 140 (MD 140). PA 16 is a two-lane road that runs through rural areas in Fulton, Franklin, and Adams counties. The route heads east from McConnellsburg and crosses Tuscarora Mountain into Franklin County, where it continues east into the agricultural Cumberland Valley. Here, the passes through Mercersburg, Greencastle, and Waynesboro. PA 16 heads east through the South Mountain range, where it heads into Adams County and passes through Carroll Valley before coming to the Maryland border. PA 16 intersects several roads including PA 456 in Cove Gap, PA 75 and PA 416 in Mercersburg, PA 995 in Upton, US 11 and Interstate 81 (I-81) in Greencastle, PA 316 an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potomac River Watershed
The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved August 15, 2011 with a drainage area of 14,700 square miles (38,000 km2), and is the fourth-largest river along the East Coast of the United States and the 21st-largest in the United States. Over 5 million people live within its watershed. The river forms part of the borders between Maryland and Washington, D.C. on the left descending bank and between West Virginia and Virginia on the right descending bank. Except for a small portion of its headwaters in West Virginia, the North Branch Potomac River is considered part of Maryland to the low-water mark on the opposite bank. The South Branch Potomac River lies completely within the state of West Virginia except for its headwaters, which lie in Virginia. Course The Potomac River runs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toms Creek (Monocacy River)
Toms Creek is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed August 15, 2011 tributary of the Monocacy River in Pennsylvania and Maryland in the United States. Via the Monocacy River, it is part of the Potomac River watershed, flowing to Chesapeake Bay and the Atlantic Ocean. The creek rises on South Mountain in southwestern Adams County, Pennsylvania, and flows south, then southeast, through Iron Springs and Carroll Valley, Pennsylvania, and past Emmitsburg, Maryland. See also *List of rivers of Maryland *List of rivers of Pennsylvania This is a list of streams and rivers in the U.S. state of Pennsylvania. By drainage basin This list is arranged by drainage basin, with respective tributaries indented under each larger stream's name. Delaware Bay Chesapeake Bay *''E ... References {{authority control Rivers of Pennsylvania Rivers of Maryland Rivers of Adams County, Pennsylvania Tribut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacks Mountain
Jacks Mountain is a stratigraphic ridge in central Pennsylvania, United States, trending southeast of the Stone Mountain ridge and Jacks Mountain Anticline. The ridge line separates Kishacoquillas Valley from the Ferguson and Dry Valleys. Jacks Mountain lies in Mifflin, Huntingdon, Snyder, and Union Counties, and the ridge line forms part of the border between Huntingdon and Mifflin Counties. It is named for Jack Armstrong, an 18th-century fur trader. In the autumn of 1743, Armstrong confiscated the horse of Mushemeelin, a Delaware Indian from Shamokin who was in debt to Armstrong. Mushemeelin and two Delaware companions tracked Armstrong to the Juniata River narrows and, in 1744, killed the trader and his two servants. The site was thereafter known as "Jack's Narrows".James H. Merrell, ''Into the American Woods: Negotiators on the Pennsylvania Frontier'' (New York: Norton, 1999; ), 42–45. U.S. Route 22 (US 22), the William Penn Highway, and the former Pennsylvania Main L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defense Information Systems Agency
The Defense Information Systems Agency (DISA), known as the Defense Communications Agency (DCA) until 1991, is a United States Department of Defense (DoD) combat support agency composed of military, federal civilians, and contractors. DISA provides information technology (IT) and communications support to the President, Vice President, Secretary of Defense, the military services, the combatant commands, and any individual or system contributing to the defense of the United States. Headquarters From January to July 2011, DISA relocated more than 4,500 military and civilian employees and supporting onsite contractors, 700 workstation suites with 11,000 pieces of IT equipment, and 58,000 square feet of lab equipment in accordance with the Base Realignment and Closure legislation of 2005. The relocation to Fort George G. Meade, Md., consolidated DISA headquarters elements that were housed in multiple locations in Arlington and Falls Church, Va. In April 2011, DISA held a ribbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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