  We suggest that the Virgo Overdensity (VOD) of stars in the stellar halo is
the result of a radial dwarf galaxy merger that we call the Virgo Radial
Merger. Because the dwarf galaxy passed very near to the Galactic center, the
debris has a large range of energies but nearly zero $L_z$ angular momentum.
The debris appears to extend from 5 to 50 kpc from the Sun in the Virgo region.
We connect different parts of this merger debris to the Perpendicular and
Parallel Streams (the Virgo Stellar Stream is associated with either or both of
these streams), the Hercules-Aquila Cloud (HAC), and possibly the Eridanus
Phoenix Overdensity (EriPhe). This radial merger can explain the majority of
the observed moving groups of RR Lyrae and blue horizontal branch stars that
have previously been identified in Virgo. This merger also produces debris in
the Solar neighborhood similar to that identified as the Gaia-Enceladus or it
Gaia-sausage merger. Orbits are provided for components of the Virgo Radial
Merger progenitor and for debris that appears to be related to the Cocytos
Stream, which was also recovered in the Virgo region.

Astrophysics of Galaxies