The fault is not the the vagueness of the question, but your obvious ignorance of the subject. If I asked how did the people get from the east to the west coast, anyone who knew American history would know that I was imply how did the pioneers to the West coast, and Giving a sarcastic answer saying they walked is an insulting reply. I know that they traveled to the West in wagon trains, along certain routes like the Santa Fe. Since this is a history forum, that question would rule out the use of 747, and modern transportation.
If you don't know anything about the subject, and you clearly don't, you shouldn't bother to reply. I clearly understood what the poster was getting at, because unlike you I knew a tiny bit about the topic. The rules of the forum clearly bans sarcasm, so I suggest you re-read those rules.