I. Migration management (proliferation of migration categories] 

II. Creation of complex geographies of border enforcement a. Re-scaling borders

b. Shifting borders outwards from territories - externalization 

c. Incarceration and Campization and privatization

Reading:

Darling (2016) Forced migration and the city Irregularity, informality, and the politics of presence, Progress in Human Geography doi: 10.1177/0309132516629004 

Ehrkamp, P. (2017) Geographies of migration I: Refugees, Progress in Human Geography 2017, Vol. 41(6) 813–822 http://phg.sagepub.com/content/early/2016/02 /09/0309132516629004.abstract