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: "where did the phrase all is fair in love and war come from?" whose answer is John Lyly's Euphues.
Each document should contain about 30 words, and these documents should contain useful information.

Query: origin of the phrase "all is fair in love and war"
Useful Output:

Doc 1: English Tutor Nick P Proverbs (65) All is Fair in Love and War. 7.5K  Did you Ever Wonder Where the Tiramisu Came From? - Word Origins (543)
Doc 2: How true is the phrase "All is fair in love and war"? Archived post. New comments cannot be posted and votes cannot be cast. Upvote 2. Downvote
Doc 3: ' The first know appearance of the quote worded 'all is fair in love and war' is in English author Francis Edward Smedley's 1850 novel 'Frank
Doc 4: The Origins of the Phrase. The earliest recorded use of the phrase "All is fair in love and war" can be traced back to John Lyly, an English
Doc 5: Discover the meaning, origin, and examples of the phrase "All Is Fair In Love And War," along with alternative expressions and usage tips.