After Onslaughts retreat, he left many of his own sentinels and even his own mutant expierements. He even had a mini-sentinel mutant called Sentinel X. This is their story of trying to fill out their masters wishes and destroy the X-Men.
We join the X-Men while trying to protect the citizens of New York from a current Siege of Sentinels brought out by the Children of Onslaught.
"We'll never be able to save this city, there are just too many sents." Magneto stated
"We're gonna hafta try atleast" replied Wolverine
"C'mon men we will have to kill as many as we can" Gambit said as he destroyed one sentinel's arm.
Over all this mayhem there sat Professor Xavier doing what he could to help them and Bruse Banner (now an X-man) standing at his side.
"Well, I guess I should go and help to" Bruce said as he walked onto ground zero and nearly got stepped on by a sent.
"RAAAAAAAAUUUUUGGGGHHHHHHHHHHH!!!" then Bruce became Hulk and caught up w/ the sentinel that nearly killed him.
"No one stomp on the HULK!!!" he exclaimed as he speared the sents back knee cap ripping it's lower leg straight off.
The mayhem continued like that for another hour or so and they finally had to retreat to lick their wounds and then go out later and hopefully the COO (Children Of Onslaught) hasen't sent out more sents. This is the beginning of the end. The first chapter of the last series. This is gonna make or break the X-Men.....