Currently, it's a town of 2,400 people about 12 miles from Philadelphia, PA.

During World War I, it was the home of the largest rifle factory in the world, where nearly 2 million rifles were made. A look at Eddystone Arsenal in the archives (thread) https://www.worldwar1centennial.org/images/Pennsylvania/EDDYSTONE_M1917_WOODWORKING_BLDG_illustrated2.pdf

A Model 1917 rifle made in Eddystone (from @NRA_museums): http://www.nramuseum.org/guns/the-galleries/world-war-i-and-firearms-innovation/case-32-wwi-america-and-the-allies/us-eddystone-model-1917-bolt-action-rifle.aspx

The rifle and its many parts: https://catalog.archives.gov/id/55175442 

Crowd leaving through one of the many gates of the plant: https://catalog.archives.gov/id/55175426 

Crowd leaving through one of the many gates of Midvale Steel & Ordnance Co.: https://catalog.archives.gov/id/55175436 

Rolling the barrel: https://catalog.archives.gov/id/55175456 

Line of barrel straightening machines: https://catalog.archives.gov/id/55175418 

Cases of barrels with milling machines in background: https://catalog.archives.gov/id/55175428 

Heating receivers for temper: https://catalog.archives.gov/id/55175452 

Small electrical truck loaded with receivers: https://catalog.archives.gov/id/55175438 

Turning lathe at work on stocks: https://catalog.archives.gov/id/55175430 

Shaving gun stocks: https://catalog.archives.gov/id/55175432 

A line of polishing machines: https://catalog.archives.gov/id/55175448 

Woman broaching key seat in front sight carrier for rifle: https://www.loc.gov/item/92522615/ 

Milling primers: https://www.loc.gov/item/2016645648/

Profiling extractors: https://www.loc.gov/item/2002716625/

Testing guns in indoor rifle range: https://catalog.archives.gov/id/55175446 

Dipping gun stocks in oil to preserve them: https://catalog.archives.gov/id/55175440 

Dipping rifles in oil before shipping: https://catalog.archives.gov/id/55175422 

United States officers inspecting rifles: https://catalog.archives.gov/id/55175424 

Secretary of the Navy, Daniels attended the ceremonies which marked the delivery of one million rifles to the Government within a year by the Midvale Steel Company, Eddystone, PA. Secretary Daniels is shown with a few of the women workers in the plant: https://catalog.archives.gov/id/45535026 

"In April 1917... several explosions in an ammunitions factory rocked this riverside community, causing shock waves felt miles away and leaving 132 people dead. Some 52 were never identified. Others were identified only by the clothes they were wearing." https://www.delcotimes.com/news/eddystone-remembers-th-anniversary-of-ammo-plant-blast-that-rocked/article_14fe681d-96e5-51de-aec0-81685c778098.html

Fire apparatus on its way to the Eddystone Ammunition Plant where a series of explosions killed a great many persons: https://catalog.archives.gov/id/31478231 

Scene at Eddystone after the explosion. Captain Morey and officers going to help: https://catalog.archives.gov/id/31478233 

Guards keeping back people that swarmed around the plant to find out whether their loved ones were injured, alive, or dead: https://catalog.archives.gov/id/31478191 

Burying the unidentified victims of the Eddystone Munitions disaster, April 13, 1918: https://catalog.archives.gov/id/31478080 

Burying the unidentified victims of the Eddystone Munitions disaster, April 13, 1918: https://catalog.archives.gov/id/31478088 

Burying the unidentified dead victims of the explosion at the Eddystone Plant at Chester, Pennsylvania. April 1917: https://catalog.archives.gov/id/31478195 

The bodies of sixty-three unidentified victims of the Eddystone explosion were buried together in the Chester Rural Cemetery following a general religious ceremony: https://catalog.archives.gov/id/31478193 

(End of thread) For additional info and pictures: https://www.remingtonsociety.org/the-story-of-eddystone/