1. On August 12, 1846, Michigan officially became the first state in the United States to abolish the death penalty for all crimes except treason. This decision was made by the state's legislature in response to a growing movement against capital punishment.

2. August 12, 1932, saw the opening of Michigan's Mackinac Bridge, one of the longest suspension bridges in the world. The bridge spans the Straits of Mackinac, connecting the state's Upper and Lower Peninsulas, and has become an iconic symbol of Michigan.

3. In 1993, on August 12, the Detroit Tigers played their final game at Tiger Stadium, the team's home stadium since 1912. The stadium was known for its unique shape and was a beloved landmark for many Michigan residents. It has since been demolished.

4. August 12, 1861, was the date of the Battle of Fort Ridgely, a significant conflict during the US-Dakota War in Minnesota. Michigan troops played a crucial role in the battle, helping to defend the fort against a Dakota attack.

5. On August 12, 1929, the Michigan State Police was officially established by the state's legislature. The department was created to provide statewide law enforcement and has since grown to become one of the largest police agencies in the United States.