What demands did colonist in this region place on the american indians who lived there

I don't know what region you are specifically talking about but typically, colonists pushed into native American lands stealing them and killing them when they refused to move.

Colonist also brought diseases from Europe that killed a large number of the native population and engaged in constant warfare with them. Native Americans would raid colonies and vice versa.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.