Complex sentence: After his appeal to the Great and General Court of Connecticut was rebuffed, Oneco addressed a communication to Queen Anne in which he explained his divine right as sachem which placed the sachemate as a legal equal to the English monarchy.
Split into simpler sentences: After his appeal to the Great and General Court of Connecticut was rebuffed, Oneco addressed a communication to Queen Anne in which he explained his divine right as sachem. With his authority originating directly from the gods, as opposed to the Crown, Oneco argued that the sachemate was a legal equal to the English monarchy.