What is "junjung"

Junjung (various spellings, including Jung-jung, gungun also dyoung-dyoung etc.) is the name for the royal war drum of the Serer people in Senegal and the Gambia. It was played on the way to the battlefield, on special State occasions as well as on Serer religious ceremonies. It is also the progenitor of the music of the same name found in the Caribbean.