Today in US history on April 12: From the outbreak of civil war to civil rights, public health breakthroughs, and the dawn of the space shuttle era

April 12 in US history marks a series of defining moments that span the outbreak of civil war, transformative leadership transitions, breakthroughs in public health, pivotal civil rights activism, and the dawn of a new era in space exploration.

From the first shots at Fort Sumter to the launch of the Space Shuttle program, the events of this day reflect turning points that have shaped the nation’s political, social, and technological trajectory.

1861: Attack on Fort Sumter sparks the Civil War


The Battle of Fort Sumter began in 1861 when Confederate forces fired on the Union-held Fort Sumter in Charleston. The assault marked the outbreak of the American Civil War, initiating open conflict between the Union and the Confederacy.

1945: FDR dies in office, Truman becomes president

US President Franklin D. Roosevelt died in 1945 of a cerebral hemorrhage in Warm Springs at age 63. Vice President Harry S. Truman was sworn in soon after, taking office during the final phase of World War II.

1955: Salk’s Polio vaccine was confirmed safe and effective

The polio vaccine developed by Jonas Salk was declared safe and effective in 1955, marking a major advance in combating Polio. The breakthrough enabled widespread immunization and led to a sharp decline in cases.

1963: Arrest in Birmingham leads to landmark civil rights letter

Civil rights leader Martin Luther King Jr. was arrested in Birmingham in 1963 during anti-segregation protests. While in jail, he wrote the influential Letter from Birmingham Jail, which became a defining document of the civil rights movement.

1981: Space Shuttle program begins with Columbia launch

In 1981, the STS-1 mission marked the first launch of the Space Shuttle program, as Space Shuttle Columbia successfully lifted off. The mission ushered in a new era of reusable spacecraft and human spaceflight.