Complex sentence: In 1976, he was commissioned to paint a historical mural for the town hall in Narragansett, Rhode Island, and from 1977 to 1979, he completed a series of 100 American Civil War paintings.
Split into simpler sentences: In 1976, he was commissioned to paint a historical mural for the town hall in Narragansett, Rhode Island. From 1977 to 1979, he completed a series of 100 American Civil War paintings.