1. disband -- (cause to break up or cease to function; "the principal disbanded the political student organization")
2. disband, dissolve -- (stop functioning or cohering as a unit; "The political wing of the party dissolved after much internal fighting")
1.
When he was at peace, which he was very seldom, and never for any long time together, he was careful not to disband that army. - from An Inquiry into the Nature and Causes of the Wealth of Nations by Adam Smith