Complex sentence: In 1804, Emperor Francis II promoted his territory within the Holy Roman Empire from archduchy to empire in reaction to Napoleon I's proclamation of the French Empire; two years later Francis formally dissolved the defunct Holy Roman Empire.
Split into simpler sentences: In 1804, Emperor Francis II promoted his territory within the Holy Roman Empire from archduchy to empire in reaction to Napoleon I's proclamation of the French Empire in 1804. Two years later Francis formally dissolved the defunct Holy Roman Empire.