Eric Walker added When the Frontier Becomes the Wall | The New Yorker to a number of topics

Eric Walker added a number of topics and a number of links to Past wars, and added Past wars to History, prehistory and geologic time and Wars and conflicts

Eric Walker added When the Frontier Becomes the Wall | The New Yorker to 1898 Spanish-American War, and added 1898 Spanish-American War to History of the United States and Past wars

Eric Walker added a number of topics and a number of links to History of the United States, and added History of the United States to History by region and United States