What Happened To Everyone Who Joined The Weapon X Program?

While the two characters initially had nothing to do with each other, Wolverine and Sabretooth were eventually revealed to have both been mutants in the pages of X-Men in the eighties, as well as having both been a part of Weapon X.

Sabretooth was born around the same time as Wolverine, and developed mutant powers just similar enough to Wolverine's to live a similarly long life, though it's left unclear which one will ultimately live longer. When he joined up with Weapon X, he initially just got the adamantium on his bone claws, a procedure that made him not as durable as Wolverine, but considering how painful the full treatment is, I highly doubt he's complaining.

Unlike Wolverine, who cut and run at the first opportunity, Sabretooth kept coming back to Weapon X for more upgrades, including at one point getting the same adamantium procedure as Logan. All of this with one single goal in mind: to mess with Logan at every conceivable opportunity. And no matter how many times Wolverine puts the animal down, Sabretooth always finds a way back to reunite with his favorite playmate once more.