Complex sentence: In 1824, the Marquis de Lafayette returned to the United States at the invitation of President James Monroe, and made a tour of all 24 states, in which he was met by huge crowds and everywhere feted as a hero.
Split into simpler sentences: In 1824, the Marquis de Lafayette returned to the United States at the invitation of President James Monroe. He made a tour of all 24 states, in which he was met by huge crowds and everywhere feted as a hero.