This study examines the Swedish contribution to the International Security Assistance Force (ISAF) in Afghanistan, with a specific focus on the FS19 operation conducted in 2010. Despite clear tactical successes and the deployment of mechanized units, the operation failed to generate long-term operational or strategic effects. Through a theory-consuming case study, the research applies Van Wie and Walden’s “Force Employment” theory to analyze how Swedish forces acted and adapted on the tactical level and how these actions related to the operational and strategical level. The analysis highlights both adaptive use of mechanized and infantry units with early initiatives towards civilian interaction but also reveals limitations in exploiting tactical gains and in translating them into strategic progress. The findings suggest that FS19 illustrates a broader pattern within the Swedish ISAF contribution: tactical adaptability and local success were not sufficiently supported or utilized at the operational and strategic level. By placing the Swedish case within the theoretical framework of Force Employment, the study contributes to a deeper understanding of mechanized units’ role in counterinsurgency operations and sheds light on the challenges of linking tactical achievements to strategic outcomes.