1) Benefit concert 2) Join forces 3) Music festival in New Zealand 4) Work in tandem 
Band Together was a musical concert put on for the people of Canterbury, New Zealand as a response to the 2010 Canterbury earthquake which had occurred a month earlier. It was held on 23 October 2010 at Christchurch`s Hagley Park. Organised by Opshop frontman Jason Kerrison and New Zealand music personality Paul Ellis, over 31 different acts perf....
[v] - form a group or unite
confederate verb form a group or unite; `The groups banded together`