jats:titleAbstract</jats:title>jats:pSince Nigeria’s return to democratic governance in 1999, there have been renewed calls―predominantly amongst ethnic Igbos in southeast Nigeria―for the restoration of the defunct secessionist state of Biafra. The resurgent Biafran separatism has been explored through the prisms of relative marginalisation and material deprivation. However, some scholars have drifted away from dominant discussions on the rationale behind the re‐emergence of the secessionist agitations and instead focused on the myriad media that Biafran separatist movements utilise to make claims of self‐determination for Igbos. These scholars―typically linguists―invariably explore online activism by resorting to meticulous analysis of the discourses of pro‐Biafra separatists on the Internet. Whilst such robust discourse analyses of separatists’ speeches shed light on the discursive dynamics of Biafran separatism in contemporary Nigeria, they do not underscore the varied repertoires of collective action of Biafran separatists beyond Internet activism. This article fills this gap in the scholarly literature on resurgent Biafran separatism in democratic Nigeria. Drawing on the American sociologist Charles Tilly’s analytical framework of contentious contention and focusing on the Indigenous People of Biafra (IPOB)―a transnational separatist movement―I argue that the various online and offline activities of Biafran separatists in the southeastern region be construed as repertoires of contention geared toward contesting the sovereignty of the Nigerian state in order to restore the short‐lived secessionist Biafran state.</jats:p>