Israel and the Philistines were hard at war, camped with just a valley between them. When out of the camp of the Philistines, a champion arose, Goliath. He came with an offer; if any man were willing to fight him in one-on-one combat and win, the entire nation would bow down to them. He was a giant, and nobody in the camp of Israel wanted to defy him. Then one day, while David was in the camp on an errand for his father Jesse, he heard what the Philistine champion was saying and grew indignant at how this heathen was talking about his God. So he decided to take him up on his offer and challenge him to one-on-one combat in the valley. In this Valley, Goliath would learn that the God of Israel, our God, is stronger than any army.