Strategic Bombing Becomes a Central Weapon of War
Two allied air forces choose two different bombing doctrines and jointly kill hundreds of thousands of German civilians
Quick facts
- Formalized
- Casablanca Conference, January 1943
- Campaign span
- 1942-1945
- American losses
- 27,000+ killed in action
- RAF Bomber Command losses
- 55,000+ killed
What happened
The U.S. Army Air Forces and Britain's RAF Bomber Command both built massive strategic bombing fleets during World War II aimed at destroying Axis industry and morale, and formalized their cooperation at the January 1943 Casablanca Conference into what became known as the Combined Bomber Offensive, a round-the-clock campaign against occupied Europe running from 1942 to 1945. The two air forces used different methods: RAF crews flew at night and conducted area bombing of entire cities, while the USAAF flew B-17 and B-24 bombers by day and pursued precision bombing of factories and infrastructure using the Norden bombsight. The human cost was severe on both sides: American losses exceeded 27,000 killed in action, RAF Bomber Command lost more than 55,000 men, and the campaign killed more than 305,000 Germans and displaced 7.5 million more.
Why it matters
Strategic bombing during World War II established aerial bombardment of an enemy's home industry and population as a standard tool of modern warfare, a doctrine air forces have continued to apply, adapt, and debate ever since. The campaign also drove enormous wartime investment in bomber technology, from the B-17 to the B-29, that fed directly into postwar civil aviation manufacturing capacity once the war ended.
How we know
Casualty figures, campaign dates, and the differing American and British bombing doctrines are documented by the National WWII Museum, drawing on official U.S. and British military records from the war.
Sources
- The National WWII Museum. The Combined Bomber Offensive · Reputable sourcenationalww2museum.org · The domain "nationalww2museum.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- The National WWII Museum. Boeing B-17 Flying Fortress · Reputable sourcenationalww2museum.org · The domain "nationalww2museum.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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Related timelines
- World War II → · See the World War II timeline for the ground and naval war that the strategic bombing campaign was fought alongside.