Airborne leaflet propaganda
Airborne leaflet dropping is a type of propaganda where leaflets (flyers) are scattered in the air, normally by filling cluster bombs that open in midair with thousands of leaflets. Military forces have used aircraft to drop leaflets to attempt to alter the behavior of combatants and non-combatants in enemy-controlled territory, sometimes in conjunction with air strikes.
Source: Wikipedia — Airborne leaflet propaganda (CC BY-SA 4.0)