The Production Design Is Staggeringly Accurate...
I have served in the Australian Army, and I appreciated that the series clearly had booku military advisors across every aspect of the production. There are little things which contribute to the staggering sense of authenticity that most people won't even realise.
Things like target indications (in the first episode, the Major says "Target to your front, 50 yards, 5 rounds, fire!" or something to that tune -- they still teach that stuff to this day), drill & marching, the daily drudgery of army life (people keeping watch overnight, sleep deprivation, most duties are boring stuff like digging and unloading supplies rather than actual fighting), the chain of command, and most of all the uniforms. Most won't see it, but the uniforms sport regiment patches on sleeves; something I'm not sure I've seen in many other Australian war movies.
I loved this series. And this is coming from someone who's read Les Carlyon's tremendous book (I own it, so does my dad) and been in the army.