The Russian Federation’s full-scale invasion of Ukraine in February 2022 has fundamentally altered post-Cold War security norms across the European continent. This includes a reinvigorated Transatlantic approach to supporting European energy security. For example, Western Europe had for years built up a strategic security vulnerability through an over-reliance on Russian hydrocarbon resources, in particular natural gas, as well as critical infrastructure owned by Kremlin-controlled enterprises. Europe is now embarking on a transformational shift to end its longstanding dependence on Russian hydrocarbons that provides an opportunity to both decouple from an authoritarian neighbor and decarbonize its energy supply to address the climate crisis. Meanwhile, policymakers on both sides of the Atlantic have aimed to deprive the Russian government of the financial and technical means of prosecuting its military aggression in Ukraine through comprehensive sanctions and technology export control regimes. This course will explore the history of European dependence on Russian energy resources and critical infrastructure projects and will analyze how the Russian Federation has ‘weaponized energy’ against European democracies before and after it’s invasion of Ukraine, including through trends of strategic corruption and elite capture. The course will assess as a case study the current European energy infrastructure landscape and ask students to propose infrastructure, regulatory, and physical/cyber security strategies from the perspective of a practitioner of transatlantic energy diplomacy. This course will also explore contemporary trends in energy sanctions and technology export controls policies crafted by democratic states worldwide. We will review recent U.S. and European sanctions policies through the framework of existing and proposed Russia sanctions, including analysis of sanctions implemented through Executive Order and Congressional legislation, and similar legislation enacted by the European Union. The course will take a multidisciplinary approach, combining primary source readings with classroom simulations drawing on the historical, policy, science, and technology drivers of effective European energy security strategies.