Albert Sidney Johnston was a prominent American military officer during the 19th century. Born on February 2, 1803, he served in the United States Army, the Republic of Texas Army, and the Confederate States Army. Johnston was known for his leadership and strategic skills, particularly during the American Civil War. He played significant roles in several key battles, including the Battle of Shiloh and the Battle of Fort Henry. Johnston's military career was marked by his dedication and bravery, but he was killed in battle on April 6, 1862, making him one of the highest-ranking officers to die during the Civil War.