Dave and Christer,
Thank you so much for all this wonderful information! History and genealogy research is one of my greatest hobbies and I am so excited to learn more about Otto's experience in World War I. I truly appreciate your quick reply and all the useful facts. The internet is pretty amazing - thank you again!
If you have any more information or come across something in the future related to Otto Tolle, please don't hesitate to post.
Dana