I do alot of genealogy, and found that I am about an 1/8 to 1/4 Scotch Irish (Ulster Scot). I will tell you that a much higher percentage of this group fought in CW, War of 1812, and RW than other parts of my family.
You should check out the book and film documentary “Born Fighting”.
http://www.amazon.com/Born-Fighting-Scots-Irish-Shaped-America/dp/0767916883
I’m Ulster Irish/Scots/Danish and Welsh.
It’s dangerous just to be in a room with me.
LOL