What do you think was the best trained army in history? Note that it can not be a modern army. i.e. no later than world war 2. I am in an argument on youtube with a guy that insists the British army was the best trained in the world. Now dont get me wrong, the British army was pretty good but in my opinion was nowhere near the best. I personally believe that the Roman army at its height, was the best trained army in the world. They seemed to just be way more effective and not to mention. they were the most disciplined army of their time.