Complex sentence: He held the Russians until the king's arrival at the Oder, and subsequently commanded a wing at the first meeting at the Zorndorf, forced the Russians to lift their siege of the Battle of Kolberg.
Split into simpler sentences: He held the Russians at bay until the king's arrival at the Oder, and subsequently commanded a wing at the first meeting at the Zorndorf. Subsequently, he forced the Russians to lift their siege of the Battle of Kolberg.