The Komagata Maru incident has become central to ongoing debates on Canadian racism, immigration, multiculturalism, citizenship and Indian nationalist resistance. The chapters presented in this book, written by established and emerging historians and scholars in literary, cultural, religious, immigration and diaspora studies, revisit the ship’s ill-fated journey to throw new light on its impact on South Asian migration and surveillance, ethnic and race relations, anticolonial and postcolonial resistance, and citizenship. The book draws on archival resources to offer the first multidisciplinary study of the historic event that views it through imperial, regional, national and transnational lenses and positions the journey both temporally and spatially within micro and macro histories of several regions in the British Empire. This volume contributes to the emerging literature on migration, mobilities, borders and surveillance, regionalism and transnationalism. Apart from its interest to scholars of diaspora and nationalism, this book will deeply resonate with those interested in imperialism, migration, transnationalism, Punjab and Sikh studies. This book was originally published as a special issue of the journal South Asian Diaspora.