Complex sentence: The department was created during the French Revolution on 4 March 1790, pursuant to the law of 22 December 1789, starting from a part of the province of Maine which was divided into two departments, Sarthe to the east and Mayenne to the west.
Split into simpler sentences: The department was created during the French Revolution on 4 March 1790, pursuant to the law of 22 December 1789, starting from a part of the province of Maine. The latter was divided into two departments, Sarthe to the east and Mayenne to the west.