Harry S. Truman was the 33rd U.S. president, sworn in after the sudden death of former President Franklin Delano Roosevelt. Truman was Roosevelt's vice president for only 82 days before being sworn in. In his early years, Truman grew up on a farm in Independence, Missouri, with his father, mule trader John Anderson Truman, and mother, Martha Ellen Truman. His poor eyesight prevented him from playing sports as a child, but Truman pursued his passions of reading and music.
After graduating from high school, Truman worked a variety of jobs until joining the Army in 1917. He served in France during World War I until 1919 when he left the Army as a captain and returned home to marry his childhood friend, Elizabeth Virginia Wallace.
Truman started a men's clothing company, but this ultimately failed. He moved into politics, where he was successful and became a senator for Missouri in 1935. He was selected as Roosevelt's running mate in 1945, and was sworn in as president after Roosevelt's death the same year. Truman made the decision to drop the atomic bombs on Japan at the end of World War II.
An interesting piece of trivia is that Truman's middle name was simply the initial "S." His parents could not decide on a middle name for him, so they chose the letter S to honor his grandfathers, Anderson Shipp Truman and Solomon Young.