• American companies established in 1821(2 P)

A

• 1821 establishments in Alabama(9 P)
• 1821 establishments in Arkansas Territory(2 P)

C

• 1821 establishments in Connecticut(3 P)

F

• 1821 establishments in Florida Territory(7 P)

G

• 1821 establishments in Georgia (U.S. state)(7 P)

I

• 1821 establishments in Illinois(7 P)
• 1821 establishments in Indiana(16 P)

K

• 1821 establishments in Kentucky(9 P)

L

• 1821 establishments in Louisiana(4 P)

M

• 1821 establishments in Maine(9 P)
• 1821 establishments in Maryland(3 P)
• 1821 establishments in Massachusetts(13 P)
• 1821 establishments in Michigan Territory(2 P)
• 1821 establishments in Mississippi(4 P)
• Missouri(25 C, 2 P)
• 1821 establishments in Missouri(1 C, 12 P)

N

• 1821 establishments in New York (state)(26 P)
• 1821 establishments in North Carolina(2 P)

O

• 1821 establishments in Ohio(8 P)

P

• 1821 establishments in Pennsylvania(5 P)

S

• 1821 establishments in South Carolina(3 P)

T

• 1821 establishments in Tennessee(7 P)

V

• 1821 establishments in Vermont(3 P)
• 1821 establishments in Virginia(1 C, 4 P)

W

• 1821 establishments in Washington, D.C.(4 P)

0–9

• 31st Cavalry Regiment (United States)

A

• American Legation, Tangier

B

• Battery A, 2nd U.S. Artillery

M

• Missouri

P

• Pacific Squadron
• Protestant Episcopal Church Mission

S

• Spanish Florida