1. God called Abraham out of Ur of the Chaldees to go to a land
      He would give Him.
    "Genesis 15:7"

Gen.15: 7 And he said unto him, I am the LORD that brought thee out of Ur of the Chaldees, to give thee this land to inherit it.

  2. The land given to Abraham was between the river Egypt and
      the Euphrates River.
    "Genesis 15:18"

Gen. 15:18 In the same day the LORD made a covenant with Abram, saying, Unto thy seed have I given this land, from the river of Egypt unto the great river, the river Euphrates:

  3. The land was inherited by Abraham's descendants ISRAEL and
      all of it was possessed.
    "Joshua 21:43"

Joshua 21:43 KJV And the LORD gave unto Israel all the land which he sware to give unto their fathers; and they possessed it, and dwelt therein.

  4. The agreement (covenant) required that the heirs be faithful
      to God else they would perish off the land.
    "Joshua 23:12-13"

Joshua 23:12-13 12 Else if ye do in any wise go back, and cleave unto the remnant of these nations, even these that remain among you, and shall make marriages with them, and go in unto them, and they to you: 13 Know for a certainty that the LORD your God will no more drive out any of these nations from before you; but they shall be snares and traps unto you, and scourges in your sides, and thorns in your eyes, until ye perish from off this good land which the LORD your God hath given you.

  5. Israel broke the agreement time and time again.
    Judges 2:14-17"

Judges 2:14 And the anger of the LORD was hot against Israel, and he delivered them into the hands of spoilers that spoiled them, and he sold them into the hands of their enemies round about, so that they could not any longer stand before their enemies. 15 Whithersoever they went out, the hand of the LORD was against them for evil, as the LORD had said, and as the LORD had sworn unto them: and they were greatly distressed. 16 Nevertheless the LORD raised up judges, which delivered them out of the hand of those that spoiled them. 17 And yet they would not hearken unto their judges, but they went a whoring after other gods, and bowed themselves unto them: they turned quickly out of the way which their fathers walked in, obeying the commandments of the LORD; but they did not so.

  6. The Bible word "judge" means deliverer. And God time and
      time again provided Israel with judges when they repented.
    "Judges 2:16"

Judges 2:16 Nevertheless the LORD raised up judges, which delivered them out of the hand of those that spoiled them.

  7. The first judge was Othniel the nephew (and son-in-law) of faithful Caleb.
    "Judges 3:9"

Judges 3:9 And when the children of Israel cried unto the LORD, the LORD raised up a deliverer to the children of Israel, who delivered them, even Othniel the son of Kenaz, Caleb`s younger brother.

  8. God did not immediately remove the nation Israel off the
      land because He is longsuffering.
    "Num. 14:18"

Numbers 14:18 The LORD is longsuffering, and of great mercy, forgiving iniquity and transgression, and by no means clearing the guilty, visiting the iniquity of the fathers upon the children unto the third and fourth generation.