On March 12 , 1855 , the town 's petition that the area become the Township of Manteno was granted by the county 's Board of Supervisors .
The present Township of Manteno was then the east half of the Township of Rockville .
On March 12 , 1855 , the town 's petition that the area become the half of half was granted by the county 's Board of Supervisors .
The present Township of Manteno was then the east half of the Township of Rockville .