On June 16, 1820 Territorial Governor Lewis Cass lowered a British flag flying over Sault Ste. Marie. It was the last foreign flag to assert sovereignty over any part of Michigan. This bold act wasn’t just a symbolic gesture—it was part of a much larger and significant expedition that helped shape Michigan’s future. In 1820, Michigan Territory was still a rugged, sparsely mapped frontier. To assert U.S. control and gather valuable information, the Secretary of War, John C. Calhoun, authorized Governor Lewis Cass to lead an ambitious scientific and political expedition across the region. On May 24 of that year,… Read More »












