1. On March 21, 1945, the U.S. Army established Camp Sibert in Alabama. Located in Etowah County, the camp was used for training soldiers during World War II and was later converted into a missile base during the Cold War.

2. March 21, 1965, marked a significant day in Alabama's civil rights history, as thousands of protesters marched from Selma to Montgomery in what became known as the Selma to Montgomery Voting Rights March. Led by Martin Luther King Jr., the nonviolent protest aimed to secure voting rights for African Americans in the state.

3. On March 21, 1820, Alabama's first constitution was adopted, paving the way for statehood just two years later. The constitution established a bicameral legislature and protected the rights of citizens, including the right to vote.

4. In 2000, the Birmingham Civil Rights Institute opened its doors on March 21. Located in downtown Birmingham, the institute seeks to promote civil and human rights through educational exhibits and programming.

5. March 21, 1932, saw the birth of musician and actor Carl T. "Blue" Lucas in Birmingham. Lucas played with several famous jazz and blues artists, including Louis Armstrong and B.B. King, and appeared in films such as "The Color Purple" and "The Hunt for Red October."