You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who began the one hundred days rule and when?" whose answer is 20 March 1815.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the one hundred days rule begin
Useful Output:

Doc 1: The Hundred Days refers to the second reign of French Emperor Napoleon I, beginning on 20 March 1815, when Napoleon retook his throne after his
Doc 2: Napoleon enters Paris and begins his second reign; the official start of the Hundred Days period. 18 Jun 1815. The Battle of Waterloo is fought in Belgium;
Doc 3: Napoleon arrived in Paris on March 20 and governed for a period now called the Hundred Days.
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Doc 5: The Hundred Days: 1 March-18 June 1815 · stake his claim to rule France · resume his conquest of Europe · liberate France from the Allies.