Well, if you would knew history and language better, you would have not asked such question. The aim of this forum is English history and culture -- please read 1st message once again and you'll see that i mean english nation.
so here we will talk about history of the english nation
Also there is no well defined American dialect, as it's simply combination of English and foreign language, which is unique per social group (for example NY people will tell to group of people "Yous" insted of "You" (plural form mistake)).
P.S. As this is history forum, i will not correct mistakes in your english, but in the language forum i will ... please take your time to learn and correct your mistakes (both spell and grammar).