The Korean peninsula is a major hot spot of the 21st century where many different types of battles, including conventional provocations, asymmetric warfare, missile/nuclear threats, terrorist attacks, and cyber DDoS attacks, are still waged. While the peninsula is still under a grave threat of a new round of Korean War, it is still difficult to ‘explain’ (positivism) or ‘understand’ (post-positivism) Pyongyang’s bellicose behaviours due to the lack of theoretical studies of North Korea’s national and military strategy. Therefore, the aim of this study is to explain the military behaviours of North Korea in the view of Strategic Theory. In other words, while addressing major concerns and limitations about North Korea’s nuclear/missile studies in the field of International Relations, I demonstrate a great inside look at how Kim Jong Il created nuclear/missile strategy in a particular view of Strategic Theory. Specifically, in the view of Strategic Theory, I demonstrate theoretical assumptions regarding the ways in which Pyongyang establishes a link between political aims (“Kangsong Taeguk: Strong-Prosperous Nation”) and military means.’ For this, this study will focus primarily on the following three areas: • A critical Analysis on North Korea’s growing nuclear/missile threats applied to main theoretical concepts such as “strategy”, “strategic culture”, and “security” • The development of North Korea’s nuclear/missile programme in the view of strategic theory • Theorising ‘Politico-Strategic Behaviours of Pyongyang’