Swing music, also known as swing jazz, is a form of jazz music that eveloped in the early 1930s and had solidified as a distinctive style by 1935 in the United States. Swing uses a strong anchoring rhythm section which supports a brass section including saxophones, trumpets, and trombones; medium to fast tempos; and a "lilting" swing time rhythm. Swing bands usually featured soloists who would improvise a new melody over the arrangement. The danceable swing style of bandleaders such as Benny Goodman and Count Basie was the dominant form of American popular music from 1935 to 1945.