Nope, good try though. That was probably better known but much later.

Battle of Nam Dong 6 July 1964 ?

I don't think the Aussies were involved in Nam Dong. It's a bit too far North for us we were mainly confined to Phuoc Tuy province.

Clue: The battle was characterised by Regimental scale attacks being repulsed by 105mm Howitzers firing point blank with cannister and fleschette rounds. The NVA/VC were grumpy that we had setup a FSB right in the middle of one of their busiest routes into Saigon.

I've stuffed up here, this battle was the Second most notable battle. it occured after Long Tan.

My humble apologies. It was fought in part by members of 1RAR (and others) who were on their second deployment, not the first as I wrongly thought.

FYI mate...

The first Australian combat death was recorded not long afterwards, with Warrant Officer Kevin Conway of the AATTV being killed in action at Nam Dong on 6 July 1964.

http://www.vietnamroll.gov.au/history.aspx

In answer to your question... The Battle of Coral May of 1968 ?

On target! Good shot.

Sorry I took so long to answer.

Cheers mate.

What was the exact number of South Korean soldiers who served combat tours in Vietnam?

300,000
source: http://news.bbc.co.uk/2/low/asia-pacific/2679007.stm

Higher boss.

The Republic of Korea (ROK) sent three divisions of troops to Vietnam, beginning in September of 1963, to help the Americans fight against North Vietnam. The "White Horse," "Blue Dragon," and the "Tiger" divisions totaled 312,853 men over a twelve year period, forming the second largest army fighting in Vietnam. Similar to many of the United States soldiers, the only other foreign army to outnumber the ROK soldiers in the war, the Korean soldiers were not considered heroes upon their return home after the Vietnam War.
source: http://mcel.pacificu.edu/as/students/koreavet/home.htm

That's the ticket... back to you Chief Engineer.