This is the association of current and ex-service personnel who have served time in (had a posting to) 'A' Field Battery, Royal Regiment of Australian Artillery (or its designation at their time of serving). 'A' Battery is the oldest Unit in the Australian Military and the longest continuously extant. 'A' Bty RAA wears the White Lanyard of the left shoulder, unlike all other RAA units who wear the lanyard on the right shoulder, and is the only Australian Artillery Unit to bear the Kings and Queens Colours in Banner form. The Colours for all other Australian Artillery Units are the Guns with the Sovereign's Crest emblazoned on the barrels.