How did "The Lost Generation" come into existence in the literar

How did "The Lost Generation" come into existence in the literary history of the United States? What does the term "The Lost Generation" mean? Who were the leading figures of this literary movement? （Give at least two）
【正确答案】：When the First World War broke out. many American young men volunteered to take part in "the war to end wars" only to find that modern warfare was not as glorious or heroic as they thought it to be. Disillusioned and disgusted by the frivolous, greedy, and heedless way of life in America» they began to write and they wrote from their own experiences in the war. Among these young writers were the most prominent figures in American literature, especially in modern American literature. They were basically expatriates who left America and formed a community of writers and artists in Paris, involved with other European novelists and poets in their experimentation on new modes of thought and expression. These writers were named by an American writer, Gertrude Stein,"The Lost Generation", Among the greatest figures in "The Lost Generation” are Ezra Pound, William Carlos Williams, Robert Frost, F. Scott Fitzgerald, Ernest Hemingway, and William Faulkner.(P547)