"I had no prior experience, and the military training didn’t last long because there was very high demand for new recruits on the front lines. For each group sent from our training centre, about 50% died. So, I calculated that after five deployments, you have less than a 5% survival probability."

"In the military, any skill can be an advantage, including scientific skills. Several scientists came to Ukraine to fight as volunteers, including quite a few from abroad."

https://www.nature.com/articles/d41586-023-03044-z