In the 17th century, in Europe, there was a strange epidemic that caused the dead to become zombies of different blood.  At that time, the French army cooperated with many other countries in Europe and priests to work together to find a way to defeat the living dead, also known as the Undead.

The 17th century is the period of time from 1601 to the end of 1700, that is, equal to 100 years, in the Gregorian calendar (i.e. ancient calendar).  But according to the Ephemeris, the 17th Century began