Fairfax Remembers Wrote:
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> The US entered World War I 100 years ago
> yesterday. How did World War I affect Fairfax
> County? Did the federal government seize land in
> Fairfax or train troops here?
World War I was directly responsible for the establishment of what is now Fort Belvoir.
In 1910, the Feds bought 1500 acres of Fairfax County to establish a children's reformatory. However, NIMBYism was no less a factor then than it is now, and the facility was instead later constructed in Lorton.
The Army started using the land for training exercises for its Engineer School in 1912, calling the location Camp Belvoir. With the entry of the U.S. into the war, construction really took off. The government bought or condemned a lot of additional land, kicking the Quakers out of Woodlawn and completely surrounding the village of Accotink*, then built a whole shitload of temporary wood frame buildings on the newly renamed Camp A. A. Humphreys.
See also
http://www.belvoir.army.mil/history/Humphreys.htm
*This is also why Accotink is now not much more than a tiny remnant along the remaining strip of Backlick Road that intersects with Route 1.