Editing Rollback (section)

===Harry Truman===
In the [[Korean War]], the United States and the [[United Nations]] officially endorsed a policy of rollback—the protection of South Korea against an invading army of the communist North Korean government—and sent UN forces across the [[38th parallel north|38th parallel]].<ref>{{Citation |first=James I |last=Matray |title=Truman's Plan for Victory: National Self-Determination and the Thirty-Eighth Parallel Decision in Korea |journal=Journal of American History |date=Sep 1979 |volume=66 |issue=2 |pages=314–33 |jstor=1900879 |publisher=JStor |doi=10.2307/1900879}}.</ref><ref>{{Citation |first=Bruce |last=Cumings |title=The Korean War: A History |year=2010 |pages=25, 210}}.</ref><ref>{{cite book|last=James L. Roark|title=Understanding the American Promise, Volume 2: From 1865: A Brief History of the United States|url=https://books.google.com/books?id=ZMlH-LpGRTYC&pg=PA740|year=2011|publisher=Bedford/St. Martin's|page=740|display-authors=etal|isbn=9781457608483}}</ref>