Caleb, the son of Jephunneh of the tribe of Judah, was one of the twelve people from the children of Israel spoken of in the Bible who was sent by Moses to spy out the Promised Land in Numbers chapter 13. (Joshua, the son of Nun of the tribe of Ephraim, was another.) After 40 days of observation, Caleb along with the eleven other spies brought back a report that the Promised Land was indeed "a land flowing with milk and honey". However, ten of the spies also brought back a bad report that the land "devours its inhabitants", that its cities were walled, and that the "sons of Anak", a remnant of "the giants", were also present. This discouraged the children of Israel to the point where they thought of returning to Egypt for fear of their children falling prey to the land's inhabitants. Caleb and Joshua tried to encourage the people not to disobey Jehovah God, because He will be there with them to help them conquer the land, but all the people thought of stoning the both of them. As punishment for the people's unbelief and for the bad report, God caused the ten spies to die while sparing Caleb and Joshua because they followed Him wholeheartedly. He also caused the children of Israel to wander through the wilderness for 40 years until all the generation of people from 20 years old and above had died off, with the exception of Caleb and Joshua.
When Moses died, Joshua took over as the appointed leader of Israel and brought the people into the Promised Land to dispossess the nations still living there in order to inherit it. Caleb remained active in this campaign until the land rested from war, and then was given Hebron as his inheritance, where he drove out the sons of Anak living there. He gave his daughter Achsah to Othniel the son of Kenaz for overtaking the town of Kirjathsepher.
Joshua and Caleb had visited the people at the Children Of The Tribulation school to tell of their exploits in "Kingdom Come".