The author analyzes the territorial dispute between Pakistan and India over the Sir Creek situated in the Indus Delta. The article provides general information about the territorial dispute - its origins, historical development, legal aspect and the negotiation process. With the disputed area being rich in gas and oil resources, it is likely to be of great importance for ensuring energy security. However, the author posits that Sir Creek is of much greater value for Pakistan as one of the tools in the context of military confrontation with India. Lacking a tangible military advantage over its strategic rival, Islamabad can use irregular paramilitary forces to penetrate the enemy's territory, thus highlighting the factor of uncertainty in the military planning carried out by the Indians.