This is a quote from the book "Animal Farm" by George Orwell
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There was much discussion as to what the battle should be called. In the end, it was named the Battle of the Cowshed, since that was where the ambush had been sprung. Mr. Jones’s gun had been found lying in the mud, and it was known that there was a supply of cartridges in the farmhouse. It was decided to set the gun up at the foot of the Flagstaff, like a piece of artillery, and to fire it twi ce a year — once on October the twelfth, the anniversary of the Battle of the Cowshed, and once on Midsummer Day, the anniversary of the Rebellion.

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