One+Sunday+morning+Squealer+announced+that+the+hens,+who+had+just+come+in+to+lay+again,+must+surrender+their+eggs.+Napoleon+had+accepted,+through+Whymper,+a+contract+for+four+hundred+eggs+a+week

The previous comment, written below, seems to be too broad for the quote, illustrating about Napoleon's action of surrendering his subject's property, so I think collectivisation seems to be more suitable for making historical reference: the collectivisation is a plan- it was promoted by Stalin - where the peasants must join the government controlling farm and sell their grains to government, not allowing to have the profit out from business trade or market trade.
 * Min Ji. K**

In the book, Napoleon forced the hens to produce 400 eggs to sell it to other places to earn money. However, this event makes me remember about the Russian Revolution. During the Russian Revolution, Stalin had ordered the people to work harder to produce more goods. When the people rebelled, the result of rebellion was Stalin killed animals without any reasons. In animal farm, Napoleon killed innocent hens and many other animals as well. This historical event was called the Great Purge which in this book, Napoleon kills random animals without reasons.

jinheey