In chapter 4, Mr. Jones and his men return to Animal Farm to reclaim their territory and recapture the farm. However, Snowball has been preparing for an attack and has cleverly studied Julius Caesar's campaigns in a book he found in the farmhouse. Under Snowball's leadership, the animals successfully bait Mr. Jones and his men into an ambush when they are well into the yard. Once the animals charge at the humans, Mr. Jones fires his gun and wounds Snowball, who continues to fight. Boxer then viciously kicks a stable-lad from Foxwood in the skull, and the humans panic. The men proceed to sprint from the farm, and the animals successfully defend their territory.
Following their victory, the animals gather around the flagstaff and sing Beast of England in unison. Snowball and Boxer then receive the decoration "Animal Hero, First Class" while the deceased sheep is given the decoration "Animal Hero, Second Class." The animals proceed to name the conflict "Battle of the Cowshed" and set up Mr. Jones's gun at the base of the flagstaff like a piece of artillery. They decide to fire the gun twice a year, on the anniversary of the Battle of the Cowshed and the anniversary of the Rebellion. The gun's placement at the foot of the flagstaff symbolically represents the struggle and violence the animals overcame to establish Animal Farm. By placing the gun directly underneath the flagstaff and next to old Major's skull, the animals will be reminded of Mr. Jones's oppression and the sacrifices they made to establish their farm. Initially, the gun was a symbol of Mr. Jones's tyranny. Placing his former weapon underneath the flagstaff symbolically represents the animals' victory over his tyranny and serves as a reminder of the violent struggles they endured to form Animal Farm.