He paused long enough to try a swig of his wine, then continued. "Celestia betrayed her position as diarch, and my mistress was given no choice but to take back what was hers by force.  They fought over the capitol and Celestia was overpowered by Princess Luna's magic, but the traitor called upon an arcane relic, expending it to banish Princess Luna to the moon.  My ponies knew what was coming after that, so we took flight.  Not all of us; some stayed to hide or fight, and some have sworn fealty to the traitor-princess.  Much as I admire those who now rise in rebellion, we have not the numbers nor means for a prolonged conflict, and the turncoats among the Lunar Guard knew our secrets."