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Holy Roman Emperor Frederick II lands in Acre, Israel, and starts the Sixth Crusade, which results in a peaceful restoration of the Kingdom of Jerusalem.
The Treaty of Versailles is signed, ending the state of war between Germany and the Allies of World War I.
A United States Air Force A-10 Thunderbolt II crashes into an apartment complex in Remscheid, Germany, killing five people and injuring 50 others.
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