The recent detention of Palestinian activist Mahmoud Khalil, a recent graduate of Columbia University’s School of International and Public Affairs, is troubling for many reasons. Khalil, a green card holder, has not been charged with any crime. The case against him seems to rest entirely on his political speech criticizing Israel. His arrest followed a week during which people targeted him intensely online, calling for deportation, suggesting a world in which the political wishes of right-wing extremists are translated into state policy. His rapid removal to Louisiana, far from his lawyers, his friends, and his eight-month-pregnant wife, reeks of disappearances of student radicals in authoritarian nations throughout history.

But for all that is truly novel about his situation, Khalil’s case is also a reminder of the long US history of deportation and border control as a strategy to punish political radicals and quell dissent. The most famous episode of mass deportation as a tool of political repression came during the Red Scare of 1919 to 1920. During the period of intense social upheaval that followed World War I, general strikes swept cities like Seattle, and the specter of the Bolshevik Revolution haunted American politics. In the spring of 1919, an anarchist faction sent bombs in the mail to the homes of important political figures, including that of Attorney General A. Mitchell Palmer.

While flyers distributed with the bombs were traced to a print shop operated by the followers of one radical thinker known for advocating violence, there was never enough evidence against any individual to mount a criminal case. Instead, in late 1919 and early 1920, Palmer ordered a series of raids of political meetings of radical organizations. Thousands of people were arrested and detained, some with warrants and some without, and more than 550 were ultimately deported.