In Chapter 4 of Animal Farm, the news of the animals' successful rebellion spreads far and wide, stirring excitement and hope among the animals on neighboring farms. The rebellion on Animal Farm inspires many creatures to dream of freedom from their human oppressors. However, it also raises alarm among the human farmers, who fear a similar uprising on their own farms. To counteract this threat, Mr. Jones, the former owner of Animal Farm, along with other local farmers, devises a plan to retake the farm and restore their control over the animals.

As the threat of attack looms, the animals on Animal Farm prepare for defense. They organize themselves under the leadership of the pigs, particularly Snowball and Napoleon. Snowball takes charge of military strategy, while Napoleon focuses on logistical supply issues. The animals are motivated by their desire to protect their newfound freedom. They train in various military drills, learning to work together as a cohesive unit. Snowball adopts the principles of a battle strategy, drawing inspiration from historical examples, and instills a sense of unity and purpose among the animals.

The anticipated confrontation comes when Mr. Jones and his allies launch an assault on the farm, intending to reclaim their property. The animals, now armed with their knowledge and determination, bravely defend their home. The battle, known as the Battle of the Cowshed, erupts violently. The humans, underestimating the animals' resolve, are met with unexpected resistance. Snowball leads the charge with courage, rallying the animals to stand their ground. The conflict is fierce, but the animals, motivated by the ideals of their revolution, ultimately prevail.

After the battle, the animals celebrate their victory, marking it as a significant moment in their history. They feel a renewed sense of independence and solidarity. The pigs, particularly Snowball and Napoleon, use this victory to further cement their authority and leadership roles. Snowball is hailed as a hero, and the animals establish a tradition of commemorating the battle. They create a flag to symbolize their unity and freedom, and a new song emerges that embodies their revolutionary spirit.

This chapter serves as a critical turning point in the story, illustrating the animals' determination to protect their hard-won freedom. It highlights the themes of unity and resistance against oppression, while also foreshadowing the complexities of leadership and the potential for corruption that will emerge as the pigs consolidate their power. The Battle of the Cowshed not only solidifies the animals' independence but also sets the stage for the power struggles that will follow in the subsequent chapters.