Many thanks, toadfrog, for the link. I found a lot of the songs we sang at the sad anniversary celebrating the fall of Rastatt, where liberty had her last stand in 1849. My wife is from this ancient battle ground.
Here I learned that General Blenker who fought near her hometown in 1849 lead a division in the Civil War.
A remark to the song "First Call": The melody is probably not the choral "O Haupt voll Blut und Wunden". The second and third verse start with "Wenn alle untreu werden". This is also the start of a famous song from the Liberation War of 1813. It is sung to the melody of "Wilhelmus van Nassauwe", the national anthem of the Netherlands. It is livelier than the choral and fits better to the song when not sung too slowly.

Wilfried