Complex sentence: Antin Holovaty was able to sidestep these repressions because of the rank of Captain which he was awarded to him by the Empress during his trip to Petersburg, and the fact that he had retired from the Cossack Host and put his energies into managing his estate.
Split into simpler sentences: Antin Holovaty was able to sidestep these repressions because of the rank of Captain which he was awarded to him by the Empress during his trip to Petersburg. He retired from the Cossack Host and put his energies into managing his estate.