Whatever became of the Roman Army in the West

[MarcellusCCLXXV]

Does anyone happen to know whatever became of the Roman Army in the West after 476 A.D. (the legend of King Arthur notwithstanding)? Intuitively one would think that at least some soldiers perhaps: (1) gave up warfare and went into farming, or perhaps some other activity such as local security; (2), joined up with the Gothic armies, etc.; (3) organized resistence forces and held out a little longer; (4) made their way east to join up with Zeno's army in the East Roman Empire; (5) might have been killed off by the "new ownership"--the Barbarians. These possibilities are not mutually exclusive, necessarily. Also, of course I am only speculating on all this, so is their any actual historical evidence pointing to what really might have happened? If not, does anybody else have any additional thoughts? Thanks. Marcellus.