Who broke the treaties between the Native Americans and the US?

The treaties between Native Americans and the U.S. government were often broken by various federal and state authorities, driven by expansionist policies and economic interests. Prominent figures, such as President Andrew Jackson, played significant roles in violating these agreements, particularly through policies like the Indian Removal Act, which led to forced relocations. Additionally, local settlers and state governments frequently ignored treaty stipulations, leading to further encroachments on Native lands. Ultimately, systemic neglect and a lack of accountability contributed to the ongoing violation of these treaties.