1. In 1821, Michigan officially became a territory of the United States. This event ultimately led to Michigan's statehood in 1837.

2. On August 4, 1932, the Detroit Zoological Society was founded. The society was responsible for the establishment of the Detroit Zoo, which opened on August 1, 1928.

3. In 1936, one of the most infamous events in Michigan's history occurred on August 4. The infamous "Battle of the Overpass" took place at the Ford River Rouge Plant in Dearborn. This event involved a violent confrontation between representatives of the United Automobile Workers (UAW) and security personnel working for the Ford Motor Company.

4. On August 4, 1984, a group of volunteers planted 15,000 trees at a park in Ann Arbor. This event became known as the "15,000 Tree Plant-In", and it helped to showcase the importance of environmental conservation and activism.

5. The first Detroit Jazz Festival was held on August 4, 1980. The festival has since become an annual tradition, and it attracts thousands of visitors to the city each year to enjoy the sounds of jazz music.