Farmer Jones came home late and drunk from town and forgot to feed the animals. Their hunger caused them to rebel.
The incident that triggered the beginning of World War 1 was the assassination of the heir to the Austro-Hungarian throne.
HMS jingle bell sunk.
The rebels gathered in the square, ready to fight for their freedom.
whiskey rebellion
Whisky Rebellion
The Whiskey Rebellion.
see related link
Shay's Rebellion
A Bosnian conspirator shot Ferdinand's wife Sophie, then shot Ferdinand. They both died.
This is because the farm was took over by the animals. In chapter 2, it quoted that "And so, almost before they knew what was happening, the Rebellion had been successfully carried through: Jones was expelled, and the Mankr Farm was theirs." Imp the Rebellion wasn't expected as you can tell. It was triggered by the irresponsibility of Jones and his workers ill-treating the animals. Unable to take it anymore, they fought for their food and rebellion happened.
It is significant
The Russian Revolution