Complex sentence: Land for the fort was purchased in 1940 from William Randolph Hearst, Hearst Castle is down the coast, and adjacent landowners was named after Hunter Liggett in 1941.
Split into simpler sentences: Land for the fort was purchased in 1940 from William Randolph Hearst (Hearst Castle is down the coast), and from adjacent landowners. It was was named after Hunter Liggett in 1941.