Complex sentence: Quashquame attended several meetings with the U.S. Army at Fort Madison during the turbulent period leading up to the War of 1812, and his band of Sauk remained neutral during the war.
Split into simpler sentences: Quashquame attended several meetings with the U.S. Army at Fort Madison during the turbulent period leading up to the War of 1812. Quashquame and his band of Sauk remained neutral during the war.