What does 1 Samuel 29:11 mean?

So David and his men got up early and left in the morning to go back to Philistine territory, while the Philistines marched on to Jezreel. 1 Samuel 29:11 - Modern Text Bible

(David and his men head back to their base, while the Philistine army continues on to fight Israel. This turn of events spares David from having to fight against his own people.)