# Battle of Britain, 15 September 1940: How the RAF Held On > Why did Britain win the Battle of Britain? Explore the raids of 15 September 1940 through radar, fighter control, commanders, aircraft, and the invasion Germany could not safely launch. Canonical URL: https://aristotree.com/juneatlas/battle-of-britain-15-september-1940-how-the-raf-held-on Language: en Creator: juneatlas Last modified: 2026-10-08T11:16:29.306Z Concepts: 15 Relationships: 30 This is a public, user-curated knowledge graph. Follow the cited sources when verifying claims. ## Concepts ### No. 303 Squadron RAF No. 303 Squadron served within RAF Fighter Command during the Battle of Britain. No. 303 Squadron flew Hawker Hurricanes during the Battle of Britain. Topics: history Sources: - https://en.wikipedia.org/wiki/No._303_Squadron_RAF - https://en.wikipedia.org/wiki/No._303_Squadron_RAF?action=history - https://creativecommons.org/licenses/by-sa/4.0/ - https://www.iwm.org.uk/sites/default/files/press-release/Battle_of_Britain_and_Blitz_Factsheet.pdf ### Royal Observer Corps Observer Corps reports fed into the air-defense system used to track German raids. Ground observers complemented Chain Home radar by tracking aircraft over land. Topics: history Sources: - https://en.wikipedia.org/wiki/Royal_Observer_Corps - https://en.wikipedia.org/wiki/Royal_Observer_Corps?action=history - https://creativecommons.org/licenses/by-sa/4.0/ - https://www.iwm.org.uk/sites/default/files/press-release/Battle_of_Britain_and_Blitz_Factsheet.pdf ### Women's Auxiliary Air Force WAAF personnel worked in reporting, plotting, and communications roles within the air-defense network. WAAF personnel supported Fighter Command’s operations during the Battle of Britain. Topics: history Sources: - https://en.wikipedia.org/wiki/Women's_Auxiliary_Air_Force - https://en.wikipedia.org/wiki/Women's_Auxiliary_Air_Force?action=history - https://creativecommons.org/licenses/by-sa/4.0/ - https://www.iwm.org.uk/sites/default/files/press-release/Battle_of_Britain_and_Blitz_Factsheet.pdf ### RAF Uxbridge Park directed No. 11 Group from RAF Uxbridge. The operations room at RAF Uxbridge was part of the Dowding system’s fighter-control network. Topics: history Sources: - https://en.wikipedia.org/wiki/RAF_Uxbridge - https://en.wikipedia.org/wiki/RAF_Uxbridge?action=history - https://creativecommons.org/licenses/by-sa/4.0/ - https://www.iwm.org.uk/sites/default/files/press-release/Battle_of_Britain_and_Blitz_Factsheet.pdf ### No. 11 Group RAF Keith Park commanded No. 11 Group during the Battle of Britain. No. 11 Group was the Fighter Command formation responsible for London and southeast England. Topics: history Sources: - https://en.wikipedia.org/wiki/No._11_Group_RAF - https://en.wikipedia.org/wiki/No._11_Group_RAF?action=history - https://creativecommons.org/licenses/by-sa/4.0/ - https://www.iwm.org.uk/sites/default/files/press-release/Battle_of_Britain_and_Blitz_Factsheet.pdf ### Keith Park Air Chief Marshal Sir Keith Rodney Park, was a New Zealand-born officer of the Royal Air Force (RAF). During the Second World War, his leadership of the RAF's No. 11 Group was pivotal to the defeat of the Luftwaffe in the Battle of Britain. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Keith_Park - https://en.wikipedia.org/wiki/Keith_Park?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Chain Home Chain Home, or CH for short, was the codename for the ring of coastal early warning radar stations built by the Royal Air Force (RAF) before and during the Second World War to detect and track aircraft. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Chain_Home - https://en.wikipedia.org/wiki/Chain_Home?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Hawker Hurricane The Hawker Hurricane is a British single-seat fighter aircraft of the 1930s–40s which was designed and predominantly built by Hawker Aircraft Ltd. for service with the Royal Air Force (RAF). Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Hawker_Hurricane - https://en.wikipedia.org/wiki/Hawker_Hurricane?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Hugh Dowding Air Chief Marshal Hugh Caswall Tremenheere Dowding, 1st Baron Dowding was a senior officer in the Royal Air Force. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Hugh_Dowding - https://en.wikipedia.org/wiki/Hugh_Dowding?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Dowding system The Dowding system was the world's first wide-area ground-controlled interception network, controlling the airspace across the United Kingdom from northern Scotland to the southern coast of England. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Dowding_system - https://en.wikipedia.org/wiki/Dowding_system?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Luftwaffe The Luftwaffe was the aerial-warfare branch of the Wehrmacht before and during World War II. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Luftwaffe - https://en.wikipedia.org/wiki/Luftwaffe?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Operation Sea Lion Operation Sea Lion, also written as Operation Sealion, was Nazi Germany's code name for their planned invasion of the United Kingdom. It was to have taken place during the Battle of Britain, nine months after the start of the Second World War. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Operation_Sea_Lion - https://en.wikipedia.org/wiki/Operation_Sea_Lion?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Supermarine Spitfire The Supermarine Spitfire is a British single-seat fighter aircraft that was used by the Royal Air Force and other Allied countries before, during, and after World War II. It was the only British fighter produced continuously throughout the war. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Supermarine_Spitfire - https://en.wikipedia.org/wiki/Supermarine_Spitfire?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### RAF Fighter Command RAF Fighter Command was one of the commands of the Royal Air Force. It was formed in 1936 to allow more specialised control of fighter aircraft. It operated throughout the Second World War, winning fame during the Battle of Britain in 1940. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/RAF_Fighter_Command - https://en.wikipedia.org/wiki/RAF_Fighter_Command?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Battle of Britain, 15 September 1940: How the RAF Held On Why did Britain win the Battle of Britain? Explore the raids of 15 September 1940 through radar, fighter control, commanders, aircraft, and the invasion Germany could not safely launch. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Battle_of_Britain_Day - https://en.wikipedia.org/wiki/Battle_of_Britain_Day?action=history - https://creativecommons.org/licenses/by-sa/4.0/ - https://www.iwm.org.uk/sites/default/files/press-release/Battle_of_Britain_and_Blitz_Factsheet.pdf ## Relationships - Women's Auxiliary Air Force — related_to → Royal Observer Corps: Complementary reporting roles - No. 11 Group RAF — related_to → RAF Uxbridge: Headquarters at Uxbridge - No. 303 Squadron RAF — related_to → Hawker Hurricane: Flew Hurricanes in 1940 - No. 303 Squadron RAF — related_to → RAF Fighter Command: Fighter Command squadron - Royal Observer Corps — related_to → Chain Home: Complemented radar coverage - Royal Observer Corps — related_to → Dowding system: Provided visual aircraft reports - Women's Auxiliary Air Force — related_to → RAF Fighter Command: Supported Fighter Command - Women's Auxiliary Air Force — related_to → Dowding system: Staffed reporting and plotting roles - RAF Uxbridge — related_to → Dowding system: Housed a control centre - RAF Uxbridge — related_to → Keith Park: Park’s operational headquarters - No. 11 Group RAF — related_to → RAF Fighter Command: Part of Fighter Command - No. 11 Group RAF — related_to → Keith Park: Park commanded the group - Keith Park — related_to → Dowding system: Used coordinated control - Hugh Dowding — related_to → Dowding system: Developed defense system - RAF Fighter Command — related_to → Supermarine Spitfire: Operated Spitfires - RAF Fighter Command — related_to → Hawker Hurricane: Operated Hurricanes - Luftwaffe — related_to → Operation Sea Lion: Sought invasion conditions - Dowding system — related_to → RAF Fighter Command: Coordinated interceptions - Chain Home — related_to → Dowding system: Supplied early warnings - Keith Park — related_to → RAF Fighter Command: Led its No. 11 Group - Hugh Dowding — related_to → RAF Fighter Command: Commanded the force - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → Supermarine Spitfire: RAF fighter aircraft - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → Hawker Hurricane: RAF fighter aircraft - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → Operation Sea Lion: Depended on air superiority - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → Luftwaffe: Launched the raids - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → RAF Fighter Command: Intercepted attacking aircraft - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → Chain Home: Provided radar warnings - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → Dowding system: Coordinated air defense - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → Keith Park: Directed No. 11 Group - Battle of Britain, 15 September 1940: How the RAF Held On — related_to → Hugh Dowding: Led Fighter Command