The first 'Swing Age' lasted from the late 1920s until the early 1950s, and was at its height in the decade between 1935 and 1945.
This was the era of 'big bands', led by jazz greats such as Fletcher Henderson, Duke Ellington", Benny Goodman and Glenn Miller, all in the USA, and Billy Cotton, Ted Heath and The Squardonaries in the UK
Continental Europe produced its own distinctive styles at this time, such as the 'gypsy swing' of Django Reinhardt.
In the 1950s, swing was eclipsed by Rock'n'Roll (which shared the same deep roots in blues). From the mid 1980s, though, there has been a strong revival of interest in swing music and dance by a generation far too young to have remembered the first swing era, the formation of new swing bands ('neo-swing') and the revival and development of swing dancing.