The 3/9 SAMR has the oldest surviving military title in South Australia.
The 3rd/9th Light Horse (South Australian Mounted Rifles) (3/9 SAMR) is a Reserve light cavalry regiment of the Australian Army based in Smithfield, South Australia.
It is part of the Royal Australian Armoured Corps (RAAC), attached to the 9th Brigade.
Formed in 1948, but trace their lineage back to a volunteer cavalry unit formed in Adelaide in 1840.