The recent crisis involving the territory of Crimea has been characterized both as a case of wrongful annexation and as one of rightful secession. Territory and competing territorial claims lie at the heart of the normative questions of secession and annexation. Any normative theory of secession or of annexation must therefore address their territorial aspect: It must explain why one agent rather than another has a valid claim to the disputed territory. One of the most interesting, yet controversial, normative accounts (...) of secession has been offered by choice theorists of secession. Choice theorists adopt a rather permissive stance, based on the normative significance of political self-determination. Choice theories, however, have been widely criticized for failing to provide a satisfactory account of what legitimates the seceding group’s territorial claim. This article argues that it is possible to remedy choice theories’ failure to address the question of territorial justification adequately. To do so, this article offers a two-tier account of territory that is grounded in the normative significance of self-determination. It defends this account of territory by showing that it is implied by our normative condemnation of annexation. It argues that the same reasons that warrant opposition to annexation provide support for secession. In closing, this article revisits the case of Crimea in light of its two-tier account of territory, and considers what role international law and institutions might play in addressing this type of situation. (shrink)