Aberdeen Proving Ground
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Aberdeen Proving Ground is a U.S. Army facility located adjacent to Aberdeen, Harford County, Maryland, United States. More than 7,500 civilians and 5,000 military personnel work at APG. Wikipedia
Acreage: 72,000-acre
Built: 1917; 107 years ago
Coordinates: 39°28′24″N 76°08′27″W / 39.473451°N 76.140837°W
In use: 1917–present