The First Promise of God
The first promise of God recorded in the His Word was given to Adam and Eve and their offspring, which includes us, and is found in Genesis 3:15. God is speaking to Satan at the time. "And I will put enmity between thee (Satan) and the woman (the people of God - His church), and between thy (Satan's) seed and her (the church of God) seed; it (Jesus) shall bruise thy (Satan's) head, and thou (Satan) shalt bruise his (Jesus) heel. Without this enmity mankind would become like Satan. But it is through God's grace (this "enmity") that man can resist his sinful, fallen, human nature and overcome Satan. The seed of the woman who is Jesus bruised Satan's head at Calvary even though Satan bruised the heel of Jesus. One was a lethal blow and the other only a temporary wound.
In Revelation chapter 12 is the story of how this prophecy took place. "And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars: and she being with child (Jesus or Yahushua) cried, travailing in birth, and pained to be delivered. And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads. And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born. And she brought forth a man child, who ws to rule all nations with a rod of iron: and her child was caught up unto God, and to His throne." Revelation 12:1-5
Satan attempted to destroy this child when He was born by moving upon Herod to slay all the children two years old and younger . (Matthew 2:1-23)
"And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of His Christ (Messiah): for the accuser of our brethren is cast down, which accused them before God day and night. And they overcame him (Satan) by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death. Therefore rejoice, ye heavens, and ye that dwell in them. Woe to the inhabitors of the earth and of the sea ! for the devil is come down unto you, having great wrath, because he knoweth that he hath but a short time." (Revelation 12:10-12)
When the Messiah was crucified, it sealed the fate of the devil. Even though the devil bruiised the Messiah's heal ( a non-deadly blow) when He was crucified; Satan received a mortal wound (his head was bruised) and eventually he is to be destoryed in the "lake of fire" . (Revelation 20:10)
What was first prophesied to Adam and Eve at the time of their fall is still not completely fulfilled, but it will be when Satan and all of his followers are destroyed and they become ashes under the soles of God's children's feet. (Malachi 4:1, 3)