This is a quote from the book "Animal Farm" by George Orwell
...warned them that after this treacherous deed the worst was to be expected. Frederick and his men might make their long-expected attack at any moment. Sentinels were placed at all the approaches to the farm. In addition, four pigeons were sent to Foxwood with a conciliatory message, which it was hoped might re-establish good relations with Pilkington.

The very next morning the attack came. The animals were at breakfast when the look-outs came racing in with the news that Frederick and his followers had already come through the five-barred gate. ...

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