 Complete the following phrase:  In 2011, the regiment fired a 21-gun salute near Sydney Harbour to commemorate Australia Day along with the 7th Field Regiment, Royal Australian Artillery. Later that year, it was re-designated as the 23rd Regiment, Royal Australian Artillery. In 2012, the regiment converted to the L16 81mm mortar as the Army Reserve artillery units were converted to the light support role. Throughout the 2000s, the regiment had depots in Kogarah, Sutherland, Holsworthy and Canberra, and deployed personnel in support of operations in the Solomon Islands, 