There were many, many times thereafter that Don regretted having enlisted - but so has every man who ever volunteered for military service.
Robert A. HeinleinThe future is better than the past. Despite the crepe hangers, romanticists, and anti-intellectuals, the world steadily grows better because the human mind, applying itself to environment, makes it better. With hands ... with tools ... with horse sense and science and engineering.
Robert A. Heinlein