The development of new pipeline infrastructure across the South Caucasus has tied states in the region together, both physically, politically and economically, boosting regionalism. Energy security has emerged as an issue of growing significance in recent decades, as countries have become increasingly reliant upon imports of hydrocarbons rather than indigenous resources. The proposed Trans-Caspian Gas Pipeline, a subsea pipeline linking Turkmenistan to Azerbaijan is a element of the Southern Corridor and the Trans-Anatolian Gas Pipeline decision, the project had been on the backburner. The European Union (EU) has invested the Southern Gas Corridor with a lot of hope and optimism, presenting it as a highly significant alternative to increasing reliance on Russian oil and gas. The energy arena has become an important arena for regional cooperation between states in the Southern Caucasus and the EU is playing a leading role in the advancement of transit infrastructure projects to boost European energy security.