Complex sentence: This was later thought of on many occasions, but we soon came to realize that the nobility could not be persuaded... we became even more convinced when the Ukrainian nobility absolutely rejected a similar project of their military governor.
Split into simpler sentences: This was later thought of on many occasions, but we soon came to realize that the nobility could not be persuaded. And as time went on we became even more convinced, when the Ukrainian nobility absolutely rejected a similar project of their military governor.