title: The Use of Force in International Law: A Case Based Approach
abstract: Book Chapter\nMary Ellen O'Connell, The Crisis in Ukraine - 2014, in The Use of Force in International Law: A Case Based Approach 855 (Oliver Corten and Tom Ruys, eds., 2018)\nIn the early morning hours of February 28, 2014, Russian armed forces moved out of their naval base on the Black Sea and into Crimea, triggering a crisis with Ukraine that continues as this chapter goes to print. The chapter begins with a detailed factual account of the Russian move into Crimea and subsequent intervention 
journal: eYLS (Yale Law School)