Any help in identifying the rank and unit of my great great grandfather shown in the attached photo would be appreciated. He is the one on the left. He was born in Zicher, kres koinigsburg, Brandenburg, Prussia in 1840, served in at least 3 wars,and immigrated to the US in 1880. Family lore[for what it is worth] says he came to the U.S. with at least six medals which his son traded for marbles. Of course one was the Iron Cross from the Franco-Prussian War. His last name was Wieseke. Thanks in advance.