I have a rough idea, of course. I'm sure their training is a tough thing to do and I don't question their discipline as I'm well aware they and others regard that very very high indeed. They are known for it. The British Royal Marines, (I know they're not classed as the British Army but Royal Navy, but still) for example train for some 32 weeks, intense training which is regarded as the longest training in the world, and if you want want to train as a sniper in the RM, add another 9 weeks on the 32. Excluding the SAS which is of course a lot whole longer, but of course they're classed as Army and are special forces. The likes of the Paras I believe is 28 weeks with another 4 weeks on top of that of parachute training if I'm not mistaken.
Ranked second best tank in the world, to who?