Quentin Roosevelt I was the youngest son of President Theodore Roosevelt and Edith Roosevelt. Inspired by his father and siblings, he joined the United States Army Air Service where he became a pursuit pilot during World War I. He was killed in aerial combat over France on Bastille Day, 1918. He is the only child of a U.S. president to have died in combat.

Theodore Roosevelt Jr., often referred to as Teddy or by his initials, T. R., was an American politician, statesman, conservationist, naturalist, and writer who served as the 26th president of the United States from 1901 to 1909. He previously held various positions in New York politics, rising up the ranks to serve as the state's 33rd governor for two years. He later served as the 25th vice president under President William McKinley for six months in 1901, assuming the presidency after McKinley's assassination. As president, Roosevelt emerged as a leader of the Republican Party and became a driving force for anti-trust and Progressive policies.