King Saul died in battle against the Philistines at Mount Gilboa. After being badly wounded, he asked his armor-bearer to kill him; when the armor-bearer refused, Saul fell on his own sword, and his sons, including Jonathan, also died that day.

What led to it

Saul’s downfall in the biblical account is tied to repeated disobedience and poor judgment, including consulting a medium instead of seeking God. That sets up the tragic end of his reign and the transfer of kingship to David.

A quick note

Some biblical passages give slightly different details about the aftermath of Saul’s death, but they agree on the main point: Saul was mortally wounded in battle and died there.

If you want, I can also give you a very short “1 Samuel 31” version or explain Saul’s story in plain English.