It is my contention the the American state Texas is at least as much of a nation historically speaking as Wales is. In the same manner in which Wales has chosen to accede to the United Kingdom, Texas has chosen to accede to the United States.
Hey look it's a wikipedia description of the comparably brief period in which Texas was a self governing nation state.
http://en.wikipedia.org/wiki/Republic_of_Texas
Now just like Wales, unless you have some personal connection to this geographical area you may well not see it as a national identity. however, just like Wales this identity is alive and well centuries into its existence for those who live there after being incorporated into a larger geopolitical unit.
Therefore I respectfully request that the Republic of Texas be added to the roster of nations which may be chosen by players entering the game etc.
Always Yours,
MAjesty