Which type of U.S. military discharge ranks below a bad-conduct discharge as the most severe?

Armor-clad knights play a game of baseball in which author's 1889 novel? Louis Armstrong performed in a 1947 film that shares its name with his hometown. What is its title? Louis Armstrong used which nickname as the title of his 1954 autobiography? In the military, a dining hall where troops eat is called what kind of hall? In the U.S. Army, which marching cadence is set at 180 steps per minute? The 1926 Army–Navy football game was played at which newly dedicated Chicago stadium? Army psychiatrist Dr. Sidney Freedman visited the doctors of the 4077th on which classic TV series? Golfer Arnold Palmer, sometimes alongside his old tractor, appeared for decades in TV ads for which motor oil brand?