Booming Indigenous Maori "haka" chants rang out across New Zealand's capital on Tuesday, as tens of thousands rallied against a conservative push to redefine the nation's founding treaty. Protests have been swelling throughout New Zealand after a minor party in the conservative coalition government drafted a bill to redefine the 1840 Treaty of Waitangi.

A proposed bill would revise the country's foundational treaty with Maori people and is hugely unpopular. Here's what to know.

The controversial Treaty Principles Bill would end the Māori right of self-determination outlined in a nearly 200-year-old treaty, opposition parties say. ACT leader and bill author David Seymour said he wants the bill to end the practice of granting Māori citizens "different rights from other New Zealanders.”