UNCANNY X-MEN (1963) #404

The secret of the X-Corp revealed! The X-Men have witnessed firsthand the power and militarism of Banshee’s squad, and they don’t like what they see! Their onetime teammate has recruited known criminals and their methods are decidedly less tolerant than those of the X-Men. Now, they learn how Banshee has recruited outlaws such as Blob and Avalanche to his cause, and it may cause a permanent rift between them! And is that Jubilee on the cover?!