From the Wikipedia entry “1945 in poetry”:
May 2, 1945, Ezra Pound was arrested by Italian partisans, and taken (according to Hugh Kenner) “to their HQ in Chiavari, where he was soon released as possessing no interest.” The next day, he turned himself in to U.S. forces. He was incarcerated in a United States Army detention camp outside Pisa, spending 25 days in an open cage before being given a tent. Here he appears to have suffered a nervous breakdown. While in the camp he drafted the Pisan Cantos, a section of the work in progress which marks a shift in Pound’s work, being a meditation on his own and Europe’s ruin and on his place in the natural world. The Pisan Cantos won the firstBollingen Prize from the Library of Congress in 1948.