You study the American South and you find the similarity of Scotland... The names, dialect( the Appalachian dialect is said a form of the Scots language).. The flags of the Civil War, the famed Stars and Bars Battle Flag, Alabama State flag is actually the St Patricks Cross (I know that's Irish) as well as others.
The Confederate saltire was not based on the St. Andrew's Cross, at least according to its designer, William P. Miles. It is a saltire, but that is a common device in heraldry, and not always associated with Scotland. Miles wanted a distinctive flag not based upon the US flag, although some ridiculed his design as a "pair of braces".

BTW, the "Stars and Bars" is not the "Battle flag" (which in itself is not correct). The former refers to the First National Flag of the CSA, whilst the latter can refer to a myriad of flags used by Confederate forces.

Regards,

Todd