What is the name of the sea-going vessel used by the Royal Australian Army during 1945 but also use as early as 2nd century AD  and developed rapidly during the Song Dynasty? 
HMAS Diamond Snake: HMAS "Diamond Snake" was a Snake-class junk built for the Royal Australian Navy during the Second World War. Junk (ship): Junk is a type of ancient Chinese sailing ship that is still in use today.
i don't know