Theorising about international relations in South Asia is a daunting task for any scholar of International Relations. The challenge lies in explaining the causal forces behind state behaviour, in order to illuminate a pattern for arriving at an understanding of these relations in a parsimonious manner.

For the last 15 years, the war in Afghanistan has caused hundreds of thousands of deaths and the United States has sent thousands of troops and spent billions of dollars supporting strategies that have been unable to curtail the violence in the country. In addition to deploying over 130,000 troops from 51 North Atlantic Treaty Organization (NATO) countries and its partner nations, the United States alone spent over $686 billion in the ‘Afghan war’.

Over the last decade we have seen a race to build ports in the Indian Ocean as the two Asian powerhouses, China and India, compete to assert their regional influence. The newest addition to this power struggle is the Chabahar Port, located in Chabahar, a coastal town in the Sistan–Baluchistan region in south-eastern Iran, next to the Gulf of Oman, and at the mouth of the Strait of Hormuz (Figure 1). Its strategic importance and economic value have drawn attention from many countries; however, India was the quickest to secure a deal to develop the port.

This article has two parts. The first part aims at analysing why nations are increasingly going beyond their multilateral and regional moorings to secure and advance their national interests. In doing so, why and how do they indulge in sub-regional engagements? It has been empirically seen across the board in almost every part of the world that sub-regional growth initiatives play a significant role in regional integration.