Home Defense is a 1943 animated short film produced by Walt Disney Productions and distributed by RKO Radio Pictures. The film shows Donald Duck and his three nephews Huey, Dewey, and Louie serving as civilian aircraft spotters during World War II. The film was directed by Jack King; Clarence Nash voices the characters.

Self-defense or self-defence (see spelling differences) is a countermeasure that involves defending the well-being of oneself or of another from harm. The use of the right of self-defense as a legal justification for the use of force in times of danger is available in many jurisdictions, but the interpretation varies widely.