I don't know much about my step-grandfather prior to his emigration from Russia in 1906 other than the fact that he was in the "Czar's army" and he left Russia to escape the brutality of that army.
It is this picture of my step-grandfather and his friend from the army that is the only clue I have:
How can I identify rank, regiment, location of service, date, or any other information that might be of help from what's shown in the picture?