When does the greasers and socs fight in book outsiders?

The major fight between the Greasers and Socs in "The Outsiders" occurs at the swimming pool. This fight happens in Chapter 4, after Ponyboy witnesses Johnny kill Bob Sheldon.

It's important to note that there are several smaller, less organized scuffles between the Greasers and Socs throughout the book. However, the swimming pool fight is the most significant and impactful confrontation.