The British home front during World War 2 saw several key mobilization efforts: millions of children were evacuated from cities to the countryside for safety, the workforce was mobilized with more women entering the labor force and munitions production increasing, and the government promoted self-sufficiency through rationing of food and household gardens. Rationing limited goods like sugar, meat, and eggs to conserve resources as fears of blockades by Germany loomed. Air raids led to total blackouts at night in cities and air raid sirens prompted citizens to take shelter. The government also mounted security and espionage efforts to counter any threats within Britain through campaigns warning citizens that "careless talk costs lives."