But they could function occasionally as a unit on rare instances of mass assaults , as in the raids on Laoag on April , Bangued in June and Candon in February 1901 .
These bands were virtually independent of each other in their operations .
Each other could function occasionally as a unit on rare instances of mass assaults , as in the raids on Laoag on April , Bangued in June and Candon in February 1901 .
These bands were virtually independent of each other in their operations .