Most youngest child soldier in WW2 - Sergey Aleshkov (born in 1936)
Was found walking in the forest by Soviet troops and got adopted by one of the officers. During battles helped soldier with bringing ammunition. Was later wounded during Stalingrad battle and sent to hospital and never went back to the fields of war. When he grew up, became a lawyer (which in Soviet Union was basically a very basic profession, not much what it was in the rest of the world). Died in 1990, one year before Soviet Union collapsed.