== The following links need to be placed == 
 These are the remaining links from the latest link harvest, that have not yet been placed in the hierarchy in the "By subject" section. 

 * History of cooperatives in the United States 
 * Demographic history of the United States 
 * History of fountains in the United States 
 * Geologic history of the United States 
 * History of hotel fires in the United States 

 * History of transgenderism in the United States 

 * History of union busting in the United States 
 * History of United States diplomatic relations by country 

 * History of United States postage rates 

 * History of United States prison systems 
 * Taxation history of the United States 
 * Technological and industrial history of the United States 
 * Territorial evolution of the United States 
 ** Territorial acquisitions of the United States 
 * History of violence against LGBT people in the United States 
 * History of youth rights in the United States 
 * Numismatic history of the United States 
 * Oxford History of the United States 
 * Postage stamps and postal history of the United States 

 * History of the flags of the United States 
 * History of the hamburger in the United States 

 * Postage stamps and postal history of the United States 
 * List of United States military history events 

 Any help would of course be appreciated.