This chapter considers the poetry of leading Irish poets (including W. B. Yeats and Thomas MacGreevy) and how their poems encountered World War One both in contemporary time and also retrospectively, in the poems of Michael Longley and Seamus Heaney, among others. An important feature of this chapter is the retrieval of several forgotten or neglected voices, including Winifred Letts and Mary Devenport O’Neill. The politics of ‘Empire’ and the role of Irish nationalism are considered in the context of the country, north and south, concluding with a survey of Irish poets writing today and their understanding of the problematic legacies of World War One in relation to Irish literary, cultural, and political history.