Complex sentence: The battles of Bennington and Saratoga are recognized as the turning point in the Revolutionary War because they were the first major defeat of a British army and convinced the French that the Americans were worthy of military aid.
Split into simpler sentences: The battles of Bennington and Saratoga are recognized as the turning point in the Revolutionary War. They were the first major defeat of a British army and convinced France that the American rebels were worthy of military aid.