As soon as they were well inside the yard, the three horses, the three cows, and the rest of the pigs, who had been lying in ambush in the cowshed, suddenly emerged in their rear, cutting them off. Snowball now gave the signal for the charge. He himself dashed straight for Jones.

George Orwell

Animal Farm. Chapter 4. In the Battle of the Cowshed, Snowball uses the battle tactics of Julius Caesar to repulse Jones and his men when they invade the farm.