Rosenberg Cast and Trial Important Events By bcdsq Jun 15, 1950 David Greenglass says Julius recruited him as a spy for the Soviet Union David Greenglass reveals Julius Rosenberg as the person who made him a spy for the Soviet Union Period: Jun 15, 1950 to Jun 19, 1953 Important Events of Rosenebrg Case and Trial Mar 6, 1951 Trial Begins Mar 28, 1951 Trial Ends Apr 5, 1951 Judge Kaufman Imposes Death Sentence On Rosenbergs Jun 19, 1953 Julius and Ethel Rosenberg are Executed