Assessing the extent to which armed conflict impacts the obligations that states have towards foreign investors and their investments under international investment treaties requires considering a wide range of issues, many of which are systemic in nature. These include substantive and procedural topics, not only with regard to international investment law, but also concerning the law on the use of force, international humanitarian law and human rights law, the law of treaties, the law of state responsibility and the law of state succession. This volume provides an in-depth assessment of the overlap between international investment law and the law of armed conflict by charting the terrain of the multifaceted and complex relationship between these two fields of public international law, fostering debate and offering novel perspectives on the matter.