1. Michigan Statehood: On March 15, 1836, Michigan was officially recognized as the 26th state of the United States. After years of territorial disputes with Ohio over the Toledo Strip, Michigan was granted statehood as a compromise that included giving Toledo to Ohio in exchange for becoming a state.

2. Ford Motor Company: On March 15, 1903, Henry Ford established the Ford Motor Company in Detroit, Michigan. The company revolutionized the automobile industry with the introduction of the Model T in 1908, and significantly contributed to Michigan's economy and industrial growth.

3. Arab-American Heritage: According to a 2010 Census, Dearborn, Michigan has the largest concentration of Arab-Americans in the United States. March 15 is recognized as Arab-American Heritage Day in Michigan, acknowledging the contributions of Arab-Americans to the state's culture and economy.

4. Gilbert Residence Hall Fire: On March 15, 1967, a dormitory fire at the University of Michigan's Gilbert Residence Hall killed seven students and injured several others. The tragedy prompted changes in safety regulations for campus housing nationwide.

5. Detroit Pistons' First NBA Game: On March 15, 1957, the Detroit Pistons played their first National Basketball Association (NBA) game against the Minneapolis Lakers (now the Los Angeles Lakers). While the Pistons lost the game, it marked the beginning of the team's legacy in Michigan sports history.