Complex sentence: Throughout his political career Frederick Augustus tried to rehabilitate and recreate the Polish state that was torn apart and stopped existing after the final partition of Poland in 1795, however he did not succeed-for this he would blame himself for the rest of his life.
Split into simpler sentences: Throughout his political career Frederick Augustus tried to rehabilitate and recreate the Polish state that was torn apart and stopped existing after the final partition of Poland in 1795. However, he did not succeed, and would blame himself for the rest of his life.