For 30 years members of the World War II commando unit were sworn to secrecy
Their heroism during the war was unacknowledged
Over the course of the war MV Krait sank more shipping than any other ship
Only the military's top brass knew of the unit's existence
17 Z Special Unit graves are at Kranji War Cemetery in Singapore
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(Speaking as a military historian, I will correct this quoted information from the article - MV Krait sank more enemy shipping than any other Australian ship - the way this was written, it could be interpreted as a claim to a world record).
The article also may give the impression that all of this was secret until now - most of it was, in fact, declassified during the 1960s and 1970s, but many of the men involved still refused to talk about it because their original orders told them they would never be allowed to do so.
I also feel it important to make it clear that Z Special Unit was a multinational force - mostly Australian, but it also had British, Dutch (including Dutch East Indies - Indonesians), New Zealand, and Timorese members, and the US Navy provided covert insertions from submarines on a number of occasions as well.
There really was something exceptional about our WWII fighting men. Some combination of personal strength, courage and durability came together about that time.
It wasn’t just our soldiers either. Our enemies were also both fierce and brilliant.
Hard to keep it a secret after they made Krait a war memorial in 1964 and put this plaque on it.