1. Pearl Harbor Day: On December 7, 1941, Imperial Japan attacked the U.S. Navy base at Pearl Harbor, Hawaii, marking America's entry into World War II. The attack had significant repercussions in Tennessee, as the state's manufacturing facilities and military bases were ramped up to support the war effort.

2. Tennessee Takes the Lead in Civil Rights: On December 7, 1955, the Montgomery bus boycott began in Alabama, sparked by the arrest of Rosa Parks for refusing to give up her seat on a bus. This event helped to ignite the Civil Rights movement, and Tennessee played a significant role in the struggle. Dr. Martin Luther King Jr. was assassinated in Memphis on April 4, 1968, sparking nationwide protests.

3. Tennessee Statehood Day: December 7, 1796, marks Tennessee's admission as the 16th state in the United States. The state played a crucial role in the Civil War, with some of the most significant battles fought on its soil.

4. Tennessee's Environmental Milestone: In December 1970, the Environmental Protection Agency was established, leading to the creation of the Clean Air Act and Clean Water Act. Tennessee has been at the forefront of environmental stewardship, with the state's Department of Environment and Conservation leading the way in managing state parks, wildlife areas, and other natural resources.

5. The Tennessee Valley Authority: In 1933, the Tennessee Valley Authority was established as part of President Franklin D. Roosevelt's New Deal program. The TVA is a federally-owned corporation responsible for managing the Tennessee River and its tributaries, as well as providing economic development, flood control, and public power to the region. The TVA has played a significant role in shaping the state's infrastructure and energy landscape.