Fifth Column Mouse

In a parable for pre WWII appeasement, a community of mice is terrorized by a hungry cat. A single mouse traitor makes a deal with the enemy, promising peace in exchange for pampering the cat. The other mice agree, but the cat's treachery is soon revealed. Realizing their mistake, the mice abandon their appeasement policy, militarize, and build a mechanical dog to defeat their oppressor and secure their freedom.