Semiconductors are the quintessential foundational, and therefore geostrategic, technology. They are simultaneously essential for (a) military and defense technology, weaponry, and equipment; (b) broader geopolitically significant science and technology, such as biosecurity and Artificial Intelligence (AI); and (c) the critical infrastructure and services upon which the daily functioning of societies rest, such as 5G networks. It is this breadth of use-cases that has raised the semiconductor industry from 'important' to the level of 'national security imperative’. This course will take students beyond the buzzwords to examine the technology (and technologies) in question, the supply chains underpinning them, the use-cases they enable, and the evolving and diverging security and economic interests animating the global policy landscape.