- The colonial administrators ended their relative isolation and brought them fully within the ambit of colonialism.
- Introduced new system of land revenue and taxation of tribal products
- Influx of Christian missionaries into the tribal areas
- They could no longer practice shifting agriculture
- Oppression and extortion by police officials
- The complete disruption of the old agrarian order of the tribal communities provided the common factor for all the tribal uprisings
UPRISINGS
- Santhals
- Kols of Chhotanagpur (1820-37)
- Birsa Munda (1899-1900)
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