God's Promise of Redemption in Eden

First, in v 15a - God's Promise of Redemption in Eden was His declaration of war between the Serpent's offspring and Eve's offspring

Second, in v 15b - God's Promise of Redemption in Eden was His assurance that, in this conflict, Eve's offspring would crush and destroy the serpent's head

Third, in v 15c - God's Promise of Redemption in Eden was His prediction that Mary's offspring would be severely wounded in this conflict