It allowed the american settlers into the indian territory
Construction methods may vary depending on the geographical location because there are going to be different environments. So what I mean is that if you tried construction in the desert, the sand would be bothersome, so you would use a special machine that can handle being in the sand, were if you did construction on a lush, green mountain, you'd need a machine that could handle not falling off, not slipping off, and things like that.
So basically, it changes depending on the environment.
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