Difficulty: Easy
Correct Answer: 11 November 1918
Explanation:
Given data
Concept/Approach
 The Armistice took effect at the eleventh hour of the eleventh day of the eleventh month in 1918.
Reasoning
 • 11 November 1918 is the date of the Armistice (end of fighting). • 28 June 1919 is the Treaty of Versailles (formal peace), not the armistice. 
Final Answer
 11 November 1918
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