Complex sentence: The Mashwanis played an active role against the Sikhs during their occupation of the Hazara region during the 19th century and later supported the British colonial rule very actively from the time of Major James Abbott onwards.
Split into simpler sentences: The Mashwanis played an active role resistance against the Sikh invasion and occupation of the Hazara region during the 19th century. Mashwanis later supported the British colonial rule very actively from the time of Major James Abbott onwards.