Complex sentence: Napoleon Bonaparte considered it one of the great works of European literature, having written a Goethe-inspired soliloquy in his youth and carried "Werther" with him on his campaigning to Egypt.
Split into simpler sentences: Napoleon Bonaparte considered it one of the great works of European literature. He thought so highly of it that he wrote a soliloquy in Goethe's style in his youth and carried "Werther" with him on his campaigning to Egypt.