1. In 1795, the Treaty of Greenville was signed, ending the Northwest Indian War and ceding much of what is now Ohio to the United States. The treaty allowed for the creation of the Northwest Territory, which was eventually divided into several U.S. states.

2. In 1862, Union forces led by General Ambrose Burnside launched an ill-fated attack on Confederate forces at the Battle of Fredericksburg, Virginia. The battle, which resulted in heavy casualties for the Union army, is considered one of the worst Union defeats of the Civil War.

3. In 1903, the Wright Brothers made their first successful powered flight near Kitty Hawk, North Carolina. The flight lasted just 12 seconds, but it marked the beginning of the age of aviation.

4. In 1975, the Indonesian invasion of East Timor began, resulting in a brutal 24-year-long occupation that left an estimated 100,000 people dead. The invasion was supported by the United States, which hoped to gain access to the country's oil reserves.

5. In 2010, President Barack Obama signed the DREAM Act into law, which provided a pathway to citizenship for undocumented immigrants who came to the United States as children. The law was later repealed by the Trump administration.