Stump the German

[Eva Elisabeth]

Thanks for your reply, Gene! I was about withdrawing the question because I thought no one was interested in guessing. (FYI AFAIK is AFAIK As Far As I Know - LOL - but alternative information might be helpful, too, so cheating allowed.)

Ok, the second one is definitely a hard one, but the first one is well-known.

Hint #3:
1.) During his career, the first one also served as a Senator from Missouri and as a US ambassador.

2.) The second one was offered a Major General's commission in the U.S. Army by W. Seward in 1861 because of his experiences in guerilla warfare in South America and Europe.