Subject Region
United States
14
Argentina
4
China
2
Germany
2
Great Britain
2
India
2
Japan
2
Latin America
2
Pennsylvania
2
Afghanistan
1
Africa
1
Belgium
1
Berlin (Germany)
1
Boston
1
Carlisle
1
Columbia Region
1
England
1
Europe, Western
1
Gettysburg
1
Hong Kong
1
Hong Kong (China)
1
Latvia
1
Liepāja
1
Luxembourg
1
Massachusetts
1
Mexico
1
Pacific Ocean
1
South Carolina
1
Southern States
1
Soviet Union
1
Virginia
1