Introducing the second volume of the Offa’s Dyke Journal (ODJ), this five-part article sets the scene by reviewing: (i) key recent research augmenting last year’s Introduction (Williams and Delaney 2019); (ii) the key activities of the Offa’s Dyke Collaboratory in 2020; (iii) the political mobilisation of Offa’s Dyke in the context of the COVID-19 pandemic lockdowns; (iv) the ramifications of accelerated efforts to decolonise the British countryside on both archaeological research and heritage interpretation on linear monuments; and (v) a review of the contents of volume 2. Together, this introduction presents the context and significance of ODJ volume 2 for both research on the Welsh Marches and broader investigations of frontiers and borderlands.