Unless you're putting an adjective over a singular noun, "The" is not added.
Example would be if you said "The great Houdini". Houdini is a proper noun, and there is only one Houdini, but you don't say "The Houdini". Anything thats a proper noun (names pretty much) don't have "The" at the front.
The America won't work because America is a proper noun.
The United states works because state is not a proper noun.
I think I've figured it out. We use "the" before an adjective. For example:
We live in the United States of America. What kind of states? United.
Why is it 'the BBC' but never 'the NBC' or 'the ABC'?
Congratulations, I'd already mentioned it before.
We say the Balkans because its become a plural noun (even though its a name of a place in its singular form: Balkan). The Americas, for instance, works. You don't say The America because its a proper noun and its also singular. Unless its something like The great America or something, but then you've just added an adjective, which is how you can put a "The" in front of a proper noun.
I guess putting "The" in front of interstates is a So-cal thing (I'm from San Diego). In SD we always put "the" in front of everything. Even when I come up here to norcal I'm always saying "Take the 580 all the way to the 13, and then take the 13 upto college avenue if you want to get to Berkeley"
And is another one that has varying use between the US and UK. For example we would say two thousand AND seven but as far as I can tell people would say two thousand seven in the US.
AND is use to signify a dot or period in math. If you say "two-thousand seven" you're saying "2007" but if you say "two-thousand and seven" it's actually "2000.7"
At least thats what my 9th grade Algebra teacher told me.
I missed that part about the adjective, sorry.
Because it obiviously JUST FECKING IS NOT