She is the author of several books on Russian history.

He continued with research on Russian history in the second half of the 19th century.

During this time he also made a 3-year study of Russian history.

This was the first time in Russian history that had happened.

It was there that he played his part in Russian history.

Russian history does not encourage the hope that will happen any day soon.

He is also the author of several books on Russian naval history.

The story of the opera is based on something that really happened in Russian history.

Here was a chance to explore what really happened during one of the most critical events in Russian history.

We are about to make the most important decision in Russian history.