Clausewitz and Jomini are two big figures in the military science community. Their principles of the concentration of force are still prevalent today in the further development of principles. With this in mind there have been some studies where computer games have been used to improve military training. The study aims to study how the principles of war can lead to victory in the real-time strategy game Starcraft II. The purpose of this study to contribute to the body of scientific knowledge with using computer games to increase the understanding of the principles of war. The method used in this study is a quantitative content analysis to gather data for analysis in the SPSS-program. The results of the study were that all the use of principles that were chosen, with the exception of surprise, correlated with victory. It also showed that spatial ability leads to higher win probability, this find lowers the reliability of the study since it cannot prove to what extent this leads to victory. However, this result is not applicable in the physical world, it can only contribute to a theoretical understanding of the principles of war.