United States 70 Texas 37 America 12 Canada 12 Great Britain 11 Europe 10 Africa 8 Illinois 7 China 6 Mexico 6 Middle East 6 Moon 4 Soviet Union 4 Alabama 3 Alaska 3 Arctic regions 3 Latin America 3 Mars (Planet) 3 North Carolina 3 West Virginia 3 Atlantic Coast (North America) 2 Australia 2 Balkan Peninsula 2 California 2 Chickamauga Battlefield (Ga.) 2 East Asia 2 France 2 Georgia 2 Greece 2 Hudson Bay Region 2 Islamic countries 2 Japan 2 London (England) 2 Minnesota 2 Mississippi 2 Napa Valley 2 North America 2 Pacific Area 2 Pacific Ocean 2 Rome 2 Russia 2 South Carolina 2 Southwest, New 2 Southwest, Old 2 Spain 2 Tennessee 2 West (U.S.) 2 Xochicalco 2 Xochicalco (Mexico) 2 Xochicalco Site (Mexico) 2 Antarctica 1 Appalachian Region, Southern 1 Arab countries 1 Arabian Peninsula 1 Arizona 1 Arlington (Tex.) 1 Asia 1 Asia, Central 1 Astoria Region 1 Astoria Region (Or.) 1 Atlanta (Ga.) 1 British Columbia 1 Burleson (Tex.) 1 Byzantine Empire 1 Canary Islands 1 Caribbean Area 1 Charleston (S.C.) 1 Charlotte (N.C.) 1 Collin County (Tex.) 1 Colorado 1 Connecticut 1 Dallas Metropolitan Area (Tex.) 1 Delaware 1 Developing countries 1 Dublin (Ireland) 1 Earth (Planet) 1 East (U.S.) 1 Ecuador 1 England 1 Europe, Central 1 Florence 1 Florida 1 Flower Mound (Tex.) 1 Fort Worth 1 Fort Worth (Tex.) 1 Fort Worth Metropolitan Area (Tex.) 1 Gondwana (Continent) 1 Great Basin 1 Greenland 1 Hudson Bay 1 India 1 Iowa 1 Iran 1 Iraq 1 Ireland 1 Islamic Empire 1 Israel 1 Istanbul 1 Italy 1 Jefferson County (W. Va.) 1