Kashkin is a Russian soldier who worked alongside Pablo and Pilar’s guerillas before Robert Jordan. He was an experienced dynamiter, like Jordan, and earned a great deal of respect from the guerillas after successfully blowing up a train. Jordan knew him as a fighter and reflects that “there was something wrong with [him] evidently and he was working it out in Spain”: the two had a friendly relationship, though Jordan was forced to shoot him after he was wounded in action. Jordan realizes that he did not feel much emotion about this killing (perhaps because it was a mercy killing and not outright murder).