Short answers, pulled from the story.
Ezra Pound is best known for founding Imagism, a movement stressing precision and economy of language, and for his 800-page epic The Cantos (c. 1917-1962). He also played a central role in launching the careers of T. S. Eliot, James Joyce, Ernest Hemingway, and H.D. by editing their work and placing it in major literary magazines.
Pound was charged with treason because he recorded hundreds of paid radio propaganda broadcasts for fascist Italy between January 1941 and March 1945. In these broadcasts he attacked the United States government, Franklin D. Roosevelt, and Jewish people, and urged American soldiers to surrender. The United States District Court for the District of Columbia indicted him in absentia on the 26th of July 1943.
Pound was incarcerated at St. Elizabeths Hospital in Washington, D.C. for over twelve years after being ruled mentally unfit to stand trial. He was released in 1958 following a campaign by fellow writers and immediately returned to Italy.
The Pisan Cantos is a collection of poetry Pound wrote while held in a U.S. military detention camp near Pisa, including three weeks spent in an outdoor steel cage. It was published by New Directions in 1948 and won Pound the Bollingen Prize for Poetry in 1949, awarded by the American Library of Congress, generating enormous controversy given his treason indictment.
Eliot sent Pound the manuscript of The Waste Land in 1922, and Pound edited it heavily, reducing it by about half. Eliot dedicated the published poem "For Ezra Pound / il miglior fabbro" (the better craftsman), from Dante's Purgatorio, and wrote in 1946 that the manuscript's editorial markings should be preserved as "irrefutable evidence of Pound's critical genius."
Pound blamed World War I on finance capitalism, which he called "usury," and promoted C. H. Douglas's theory of social credit from the 1920s onward. He wrote more than 1,000 letters a year through the 1930s, contributed articles to fascist publications, embraced Benito Mussolini's fascism, and expressed support for Adolf Hitler. These views were deeply entangled with virulent antisemitism traceable in his writing to at least 1910.