This unique state-by-state directory covers monuments, memorials, museums, markers, statues and library collections that relate to the veterans, weapons, vehicles, airplanes, victims or any other aspect of war in which the United States participated. While a site may have been created before 1900 (such as a fort), there must be some operational or historical tie to a twentieth century conflict to be included here. General collections, such as museums of aviation, are included if they house materials related to a twentieth century conflict. The coverage is so thorough that statues honoring veterans of the Civil War appear if veterans of later wars are on their rosters of honorees. Another example of the comprehensiveness of this compilation is in the inclusion of memorials to victims of war such as the Holocaust Museum in Houston, Texas.

For each site, the following information is given: street address, phone number, website and email address (if applicable), days and hours of operation, admission fees, other necessary information, and a brief description of the site.