Long ago, a big war happened. 
Long ago, a big war was happening. 

During the Second World War, a period of bombing hit the United Kingdom. This was called the Blitz. 
Nazi Germany and Italy sent planes to attack British cities. This began on September 7, 1940. It lasted for eight months. 
At first, many attacks happened during the day. They mostly hit London. But the German air force, the Luftwaffe, changed their plan. They began to attack mostly at night. This helped them avoid the Royal Air Force, or RAF.
Many cities were hit. London, Liverpool, Hull, and Birmingham were all bombed. More than 40,000 people were killed. In London, over a million houses were damaged or lost. 
The bombing did not make Britain surrender. British factories kept making things for the war. The attacks did force the country to move some work to different places. Most cities took a few weeks to fix the damage. Some cities took much longer. 
The Blitz was a major bombing campaign during the Second World War. 

How the attacks worked changed over several months. At first, the German air force, the Luftwaffe, attacked during the day. They focused heavily on London to fight the Royal Air Force. After October 1940, the Luftwaffe began attacking mostly at night. This change helped them avoid the planes of the RAF. They used the cover of darkness to reach their targets.
This campaign lasted for eight months in total. It began on September 7, 1940, and ended on May 16, 1941. Adolf Hitler and Hermann Göring ordered the new bombing policy. Göring was the commander-in-chief of the Luftwaffe. London was hit very often during this time. For 56 out of 57 days and nights, the capital was systematically bombed. 
Many different cities across the country felt the impact. 

Even with the damage, the bombing did not stop British war production. The attacks did not force the country to surrender. Instead, the British had to move some production to different places. Most cities could recover from damage in 10 to 15 days. However, some places like Birmingham took three months to recover. The German air offensive failed to destroy the British war economy. 
The Blitz was a massive aerial bombing campaign during the Second World War. 

The campaign followed a specific shift in tactics. Initially, the Luftwaffe, the German air force, conducted mass daylight attacks. They targeted London to draw the Royal Air Force (RAF) into a battle of annihilation. 
Many different types of cities were targeted throughout the United Kingdom. 

History shows that the leadership behind the Blitz had conflicting views on air power. Adolf Hitler and Hermann Göring, the commander-in-chief of the Luftwaffe, ordered the new policy in September 1940. 

The scale of the destruction was immense. More than 40,000 civilians were killed by Luftwaffe bombing during the war. 

Despite the heavy damage, the Blitz failed to achieve its strategic goals. The bombing did not demoralize the British into surrendering. It also did not seriously hamper British war production. In fact, British war production continued to increase during the eight months of bombing. The main effect was that the British had to disperse their aircraft production. Most cities recovered from severe hits in 10 to 15 days. Some larger industrial cities, like Birmingham, required three months to recover.
The Blitz is a significant example of the theories of strategic bombing. During the 1920s and 1930s, theorists like Giulio Douhet argued that air forces could win wars alone. They believed bombing industry and civilians would cause a collapse in morale. 
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