America's Oldest Military Bases – 24/7 Wall St.

22. Fort Sill Army Base
> Location: Lawton, Oklahoma
> Year opened: 1869
> Total active duty personnel: 26,189
> Military branch: Army
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USS Delaware (SSN 791) returns… (CC BY 2.0) by Official U.S. Navy Page

21. Naval Submarine Base New London
> Location: Groton, Connecticut
> Year opened: 1868
> Total active duty personnel: 13,856
> Military branch: Navy

20. Francis E Warren Air Force Base
> Location: Cheyenne, Wyoming
> Year opened: 1867
> Total active duty personnel: 6,716
> Military branch: Air Force

19. Fort Myer Army Base
> Location: Arlington, Virginia
> Year opened: 1863
> Total active duty personnel: 4,783
> Military branch: Army
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18. Rock Island Arsenal Army Base
> Location: Arsenal Island, Illinois
> Year opened: 1862
> Total active duty personnel: 1,291
> Military branch: Army