The invasion of Belgium should be the answer
        
             
        
        
        
Answer my question I’ve posted it 5 times plz
        
             
        
        
        
Answer:
The Building of Tenochtitlan About 1325, the Aztecs began building a capital city on the island in Lake Texcoco. They called the new capital Tenochtitlan (tay»nohch«teet»LAHN). In some ways the place said to be chosen by Huitzilopochtli was a good one. Having water all around made the island city easy to defend against attack.
Explanation:
 
        
                    
             
        
        
        
rail roads were  way to move goods and raw martial on mass. rails roads could move supply faster and over a longer distance than using wagons or boats witch were limited on were they can go.  causing an industrial boom.