1. In 1933, Tennessee ratified the 21st Amendment to the US Constitution, which repealed the national prohibition of alcohol. This was a significant milestone for the state, which had been a major producer of moonshine and had a long history of bootlegging.

2. On February 15, 1960, four African American college students from North Carolina A&T staged a sit-in at a Woolworth's lunch counter in downtown Nashville. This event helped to spark the Nashville sit-ins, which were a series of nonviolent protests against racial segregation that had a significant impact on the civil rights movement.

3. In 1862, the Battle of Fort Donelson began near Dover, Tennessee. The battle was a significant Union victory that opened up the way for Union forces to move further into Tennessee and the South. The battle also made Union General Ulysses S. Grant a national hero.

4. On February 15, 1873, Tennessee became the first state to ratify the 15th Amendment to the US Constitution, which gave African American men the right to vote. The state was a stronghold of the Republican Party at the time, and the ratification was seen as a significant victory for the party's efforts to expand voting rights.

5. On February 15, 2003, the nation's largest mosque opened in Memphis, Tennessee. The Islamic Center of Memphis covers over 60,000 square feet and can accommodate up to 2,500 worshippers. The mosque has become a significant symbol of religious diversity and tolerance in the state.