Sweden, Finland, Estonia, Poland and the United States had subject experts, government officials, and military members attended a ceremony in Sweden for the release of the Resistance Operation Concept. An academic tool that contains lessons from the Cold War and WWII, the ROC can be used to help prepare a country for defense and learn new techniques. The book describes methods for working together with allies and fighting against an enemy.
Source: https://www.dvidshub.net/news/356342/soceur-and-swedish-defense-university