Maternal:
Grandmother--about 3/4 Swedish (her father was half English)
Grandfather--1/2 Swedish, 1/2 Danish
Paternal (biological father):
Don't know a whole lot about their background, but
Grandmother--1/2 Swedish, 1/2 Scottish
Grandfather (never knew him)--mostly Swedish, some French Canadian, possibly some other stuff, not sure
Paternal (adoptive, but still consider them "ancestors"):
Grandmother--a mix of German, Welsh, and Cherokee
Grandfather--German and Irish
So biologically, I'm somewhere between 1/2 and 5/8 Swedish, 1/8 Danish, 1/8 Scottish, 1/16 English, and some small trace of Canuck and possibly other stuff.
My maternal grandfather served as a Navy corpsman (medic) in WWII, was on a hospital ship off Normandy.
My maternal-maternal great grandfather was in the army during WWI.
Most of my Swedish ancestry emigrated here around 1880-1890. The French Canadian ancestry of my biological paternal grandfather were supposedly "voyageur" trappers who were among the first Europeans in what we now call Minnesota. My adoptive paternal ancestors have lived in the mountains around the Shenandoah Valley of Virginia since antebellum times, but the German settlers in those parts were generally neutral in the Civil War, didn't own slaves (this was hardly cotton-growing land), and were actually Republican in the 1800s (and today, they still are, lol).
I wish I knew more about the history of my ancestors in Europe--what I DO know is mostly about the maternal line (come to think of it, my family is sort of matriarchal in a way), my maternal-maternal great grandmother's mother (whew!) was the daughter of a sawmill owner from near Huskvarna, Sweden who "got in trouble" (got pregnant) and was sort of "sent" to America because of it! And interestingly enough, she first settled in Washington state (the Spokane area, where a lot of Swedes settled), before moving east to Minnesota.