Digital History's Vietnam War
America's Longest War - textbook companion site that can be used alone
America in Vietnam
The History Channel: Vietnam War
Vietnam War - information by topics
Vets with a Mission: History of Vietnam
The Wars for Viet Nam
The Vietnam Center and Archive
Vietnam War - military history
Shmoop Study Guide for the Vietnam War
SparkNotes Guide to the Vietnam War
Wikipedia Entry for the Vietnam War
Battlefield: Vietnam - PBS website
The Digital History site has two short quizzes.
Vietnam History - quick study guide and tests from the BBC
Optional books (The first book is listed in the DSST outline. If you choose to purchase it, HC USA *highly* recommends you read the excellent review found here.):
The America's Longest War website and SparkNotes both have multiple choice-practice quizzes.
Recommended Course of Study:
Print a copy of the exam outline. Create a study journal that is divided into sections that represent each of the 12 outline topics. Read the information available at the each of the websites, taking detailed notes. Study the flashcards on America's Longest War, and complete the internet exercises and review questions. Use library materials for further research. Take the practice quizzes as final preparation before the official exam.