1. On June 24, 1812, the United States declared war on Great Britain in what became known as the War of 1812. This conflict had a significant impact on Maine's economy and society, as it disrupted trade and led to increased military activity in the region.

2. In 1868, Joshua Chamberlain was elected governor of Maine on June 24. Chamberlain was a hero of the Civil War, having led the Union forces in their victory at the Battle of Gettysburg. As governor, he worked to expand the state's educational system and improve infrastructure.

3. On June 24, 1980, the Penobscot Narrows Bridge was opened to traffic. This bridge spans the Penobscot River near Bucksport and is the tallest bridge in Maine, with a height of 447 feet.

4. In 2002, the state of Maine passed a law on June 24 allowing same-sex couples to register as domestic partners. This was a significant step towards legal recognition of same-sex relationships in the state, and paved the way for further progress towards marriage equality.

5. On June 24, 2015, Maine became the first state in the United States to enact a law allowing pharmacists to prescribe and dispense naloxone, a drug used to treat opioid overdoses. This was a critical step in addressing the opioid epidemic, which has had a significant impact on Maine and other parts of the country.