What is the hardest military training in Australia?

The Hardest Test: Australia’s Path to the SAS

Ask any soldier about the most punishing military training in Australia, and one name comes up above all: SAS Selection. This is not just a course—it’s a brutal crucible designed to separate the exceptional from the merely capable.

To even be considered for the Australian Special Air Service (SAS), candidates must first survive Selection, a notoriously unforgiving process that pushes men to the edge of physical and mental collapse. Run by the Special Operations Command, the course lasts several weeks and is deliberately shrouded in secrecy, adding to its mystique and fear factor.

It’s not just about raw strength or stamina. Selection tests resilience, judgment under extreme stress, and the will to keep moving when every instinct screams to quit. Candidates endure sleep deprivation, relentless navigation exercises across rugged terrain, and long-distance marches with heavy loads—all while being constantly evaluated for composure and leadership.

One infamous component is the "Perisher" patrol phase, where teams are monitored without warning, forced to make life-or-death decisions while exhausted and under pressure. It’s not uncommon for candidates to collapse, hallucinate, or withdraw completely. The dropout rate isn’t just high—it’s expected.

Only a fraction make it through. Those who do earn the right to wear the famed SAS beret, a symbol of one of the most elite military qualifications in the world. Unlike many special forces courses, Australia’s Selection doesn’t just train soldiers—it strips them down and rebuilds them.

In the end, it’s not about who’s the strongest or the fastest. It’s about who can endure the most, adapt the quickest, and still choose to stand when every bone aches and every thought urges surrender. That’s the standard of the Australian SAS—and why its Selection remains the hardest military test in the country.