The Spanish Civil War proved a major test for international pacifism, and the work of pacifist organisations (such as War Resisters' International and the Fellowship of Reconciliation) and individuals (such as José Brocca and Amparo Poch). Shortly after the war ended, Simone Weil, despite having volunteered for service on the republican side, went on to publish The Iliad or the Poem of Force, a work that has been described as a pacifist manifesto.[24] In response to the threat of fascism, some pacifist thinkers, such as Richard B. Gregg, devised plans for a campaign of nonviolent resistance in the event of a fascist invasion or takeover.[25]