It's the 70th anniversary of Churchill's famous 'Few' speech, marking victory in the Battle of Britain. The great oration will be recreated outside the Churchill War Rooms at 3.52pm today, followed by a fly-past of period aircraft.
For today's quiz, we're taking the wider theme of London at war, from Roman times to WWII. See if you're a Commander-in-Chief or a petty officer when it comes to the history of conflict in our city.
Let us know in the comments how you get on.
Previous London quizzes (go on, have a go): Bridges, Characters, Dogs, East London Line, Football, German London, Museums, Parks, Politics, Pubs, Science, Skies, Skyscrapers, Street Furniture, Supernatural London, the Thames.