This event involved the defeat of the breakaway (*) Ezo Republic.  
Lorenz von Stein and Rudolf von Geist were employed by the government during this event. It was opposed by groups such as the White Tiger Corps and the Northern Alliance. The period leading up to this event was known as the "end of the curtain" and saw the increased popularity of the Sonno joi movement. This event involved the defeat of the breakaway (*) Ezo Republic.  Its goals were laid out in a document promising a break with the "evil customs of the past." Both the Boshin War and the Satsuma Rebellion occurred during this event, which saw the abolition of the han system and the drafting of a new constitution. For 10 points, name this 1868 event which restored imperial rule to Japan under the namesake Emperor.
Lorenz von Stein and Rudolf von Geist were employed by the government during this event.
Meiji Restoration [or Meiji Ishin; or Meiji Revolution; accept synonyms of "reform" as well]