Accretion History of the Milky Way Dark Matter Halo and the Origin of   its Angular Momentum
  The flow of dark matter into the Milky Way and Large Magellanic Cloud in a model for the gravitational field of the neighboring galaxies yields a growth history for the dark matter halo of the Milky Way that ends up with angular momentum roughly in the observed direction, and it produces a dark matter stream around the Large Magellanic Cloud that resembles the Magellanic Stream. 
P. J. E. Peebles
astro-ph.GA