This document is an encyclopedia of ethical failures from the Department of Defense Office of General Counsel. It contains over 100 real cases of ethical violations organized by type of offense to be used as a training tool. The cases describe a range of violations including abuse of authority, bribery, conflicts of interest, fraud, gift violations, misuse of government resources, and more. Many resulted in penalties such as fines, job termination, debarment, or imprisonment. The introduction encourages readers to use it to learn from others' mistakes and avoid ethical lapses by consulting ethics officials in uncertain situations.