The period of the united monarchy begins when the judge Samuel reluctantly anoints
Saul as king of the tribes of Israel. During Saul's kingship, the Philistines attack and a young shepherd named David volunteers for a one-on-one with the fiercest of the Philistines, a giant named Goliath. With a single stone from his slingshot, David fells the Philistine and wins a reputation that outshines Saul's. When Saul dies, David replaces him as king and when David dies, his son by Bathsheba becomes the wise King Solomon. This information is basically from the Bible, with only occasional support from archaeology.