Jewish man from Volyn, Ukraine in which Russian army? #ukraine

N. Summers

´╗┐My grandfather (Sol Finkelstein) was from Radziwillow, Ukraine. He served (voluntarily, I think) in the Russian army during WWI. Apparently he spoke several languages and served as a translator. He was injured and sent to a POW camp, which I think was in/near Vienna. He must have been treated well there as i have a photo of him with two other men, all dressed in military-style uniforms. Will try to post it in ViewMate.
1. Does anyone know which army he would have joined and where?
2. Are there any records which might help?

Nancy S
Maryland USA

Finkelstein, Bookstein, Liss/Alper, Lifshitz/Leaf

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