16 September 1975 Papua New Guinea gains independence from Australia.
Papua New Guinea, article from Wikipedia     https://en.wikipedia.org/wiki/Papua_New_Guinea
O Arise, All You Sons, article from Wikipedia     https://en.wikipedia.org/wiki/O_Arise,_All_You_Sons

O ARISE, ALL YOU SONS   Various recordings on YouTube       https://www.youtube.com/results?search_query=+O+Arise%2C+All+You+Sons