Now when Saul had taken the kingdom over Israel, he fought against all his enemies on every side, against Moab, and against the children of Ammon, and against Edom, and against the kings of Zobah, and against the Philistines: and wherever he turned himself, he put [them] to the worse.
The chronology of events mentioned in this chapter is impossible of any adequate solution.  This little paragraph is a summary of Saul's forty years of fighting against Israel's enemies.  If every event in that period had been described as fully as that episode just mentioned, it would have required thousands of pages.  It was only the special moral, religious, and theological implications that led to the more complete details in this and in the following chapters.