They failed because nobody cared about the railroad. The railroad had to be a government project with leases to companies but the government was too much involved in the slavery issue that it didn't have time to deal with railroads. That's why railroads boomed after the civil war ended.
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They brought their slaves and ideas for plantations.- C.
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it means to sneak up on someone while they are distracted by something else and not expecting ur surprise attack
For a male is emperor and for women is empress
The main reason why the march through Belgium helped France is that it won it some time (not much , the Battle of Belgium was only around 2 weeks long) to re-arrange their troops and specifically to move their troops further north to Paris and surroundings.