  Observations of the Galactic Center (GC) have accumulated a multitude of
"forensic" evidence indicating that several million years ago the center of the
Milky Way galaxy was teaming with starforming and accretion-powered activity --
this paints a rather different picture from the GC as we understand it today.
We examine a possibility that this epoch of activity could have been triggered
by the infall of a satellite galaxy into the Milky Way which began at the
redshift of 10 and ended few million years ago with a merger of the Galactic
supermassive black hole with an intermediate mass black hole brought in by the
inspiralling satellite.
