Founded in 2008, The Rumjacks have grown rapidly into a locally popular band. Their style of music, which combines various elements from almost medieval Gaelic-Irish music to punk, was very popular with the community of the "pub scene" of Sydney.
The musical breakthrough came with the band's album Gangs of New Holland, released in 2010, which contained their most successful song An Irish Pub Song. It has been viewed on YouTube almost 51 million times.