The Nashville star helped changed the fortunes of an impoverished songwriter.
Merle and his band the Strangers' show at Philadelphia's Civic Centre on 14 February 1970 became a gold-selling, No. 1 live album.
'Moanin' The Blues,' which entered the country chart on 18 November 1950, became Hank's next No. 1 in the last week of the year.
Here to whet your appetite is uDiscover's sampler of 20 classic tunes that have helped to define one of America's greatest genres of music, country.