Citation tracking refers to the practice of using the bibliography or reference list of a key article to find other suitable articles, and then to search for more recent articles that cite the key article in their bibliographies or reference lists. There are several databases that allow you to do this; Google Scholar and Scopus are particularly useful for citation tracking.
"Atrocity, Authenticity and American Exceptional: (Ir)rationalising the Massacre at My Lai"
1. "The Response of the Moderate Wing of the Civil Rights Movement to War in Vietnam"
2. "Eating Soup with a Spoon: The U.S. Army as a "Learning Organization" in the Vietnam War"
3. "The -Ology War: Technology and Ideology in the Vietnamese Defense of Hanoi, 1967"
4. "Toward a Better Understanding of Attrition: The Korean and Vietnam Wars"
5. "Winning the Vietnam War: Westmoreland's Approach in Two Documents"