In "The Most Dangerous Game" what are General Zaroff's accomplishments?

General Zaroff is a Cossack who grew up in a wealthy, landed family somewhere in the Crimea, an area which has gone back and forth between Russia and the Ukraine (it is currently part of Russia). As landed gentry it was expected that Zaroff would become an officer in the Russian military. He notes that for a time he commanded a division of cavalry and, as part of the upper class, fought against the Bolsheviks during the civil war which followed the 1917 revolution. He fails to mention any specific accomplishment as a soldier, but he does go into detail about his outstanding ability as a hunter. He tells Rainsford that he killed his first bear when he was only ten years old. Afterward, hunting became Zaroff's main passion in life. He talks of hunting in every region of he world and that he was able to fund his adventures investing in "American securities" after those loyal to the czar were defeated in the civil war:

"Naturally, I continued to hunt—grizzlies in your Rockies, crocodiles in the Ganges, rhinoceroses in East Africa. It was in Africa that the Cape buffalo hit me and laid me up for six months. As soon as I recovered I started for the Amazon to hunt jaguars, for I had heard they were unusually cunning."

In fact, Zaroff becomes such an accomplished hunter that he eventually grows bored with the sport because every time he hunts he knows he will win. This is why he purchases the island where he adopts a new form of hunting involving the pursuit of men who are shipwrecked on his remote island. In the end, despite all his skill, he is unable to defeat Rainsford and when the two meet at the end of the story, Zaroff is killed by the American, who describes himself as a "beast at bay."