Region
Japan
United States
29
Japon
6
China
5
Germany
5
Korea (South)
4
Belgium
3
Manchuria (China)
3
Romania
3
Soviet Union
3
Thailand
3
Washington (D.C.)
3
Alaska
2
Atlanta (Ga.)
2
Boston (Mass.)
2
California
2
Chesapeake Bay (Md. and Va.)
2
Denver (Colo.)
2
Grenada
2
Hawaii
2
Italy
2
Liège (Belgium)
2
Lorain (Ohio)
2
Manchuria
2
Naval Station Key West (Fla.)
2
Netherlands
2
New York (State)
2
Okinawa-ken
2
Pacific Ocean
2
Point Arena (Calif.)
2
Sabine River (Tex. and La.)
2
Sagami Bay
2
Saint Louis (Mo.)
2
Singapore Strait
2
South China Sea
2
Superior (Wis.)
2
Tennessee
2
Toledo (Ohio)
2
United Kingdom
2
Virginia
2
Algeria
1
Australia
1
Austria
1
Bahrain
1
Botswana
1
Bulgaria
1
Burkina Faso
1
Cameroon
1
Canada
1
Central African Republic
1
more ...