I am Socrates!
This method even has a name; it's called Socratian Method (obviously, named after me) and it's a method that invited others to do critical thinking rather than give them ready-made answers.
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One of the major things that led to the collapse of the German army/navy and their war effort was internal fighting among the Germans themselves regarding tactics.
I think its water and iron
It increased the demand for steel since steel was used to make railcars and tracks.
Steel was used to make railroad tracks and cars because it was the only metal strong enough. So the expansion of the railroad industry would mean more steel had to be used and thus it would increase the demand.
