mr-ore:

“In 1885, Canada’s Indian Act outlawed the potlatch, an exchange of wealth practiced by the Aboriginal nations of the Northwest Coast. An 1895 amendment to the Act widened its scope to include “any Indian festival, dance, or other ceremony.” […] any occasion featuring dance regalia made out of feathers or furs.
Similarly, in 1883, the United States Bureau of Indian Affairs issued a circular entitled “The Code of Religious Offenses,” which declared Aboriginal ceremonies punishable by imprisonment.

A Department of Indian Affairs circular dated December 15, 1921, and endorsed by Duncan Campbell Scott — the top official who declared his intention “to continue until there is not a single Indian in Canada” — states that the Indian agents who represented the department at the local level were to “use [their] utmost endeavours to dissuade the Indians from excessive indulgence in the practice of dancing.” Mr. Scott was of the opinion that dancing was a “waste of time” that encouraged “sloth and idleness.” Such “demoralizing amusements” were an “obstacle to continued progress.”

To discourage the sun dance, Indian Affairs employed the services of the Royal Canadian Mounted Police and devised a pass system wherein any Aboriginal person absent from his or her reserve without permission of the Indian Agent could be arrested as hostile. This was a treaty violation and amounted to forcible imprisonment. But Aboriginal peoples are creative subversives: we modified our customs to make them harder to detect, and we gathered on European holidays to celebrate our traditions. Still, a number of people were charged with violating the anti-dancing laws, and most went to jail.

In one infamous case, a blind 90-year-old man in Fishing Lakes, Saskatchewan, was convicted of dancing and sentenced to two months hard labour – until public outcry forced authorities to suspend his sentence. In 1922, during a series of potlatch prosecutions, those convicted were told they could avoid prison terms if their fellow villagers surrendered all ceremonial masks, rattles, and jewelry. The villagers complied, and many of these objects were sold to the Royal Ontario Museum, the Canadian Museum of Civilization, and private collectors. Still other items were simply piled up and burned on the beach.“

[source]

The psychological damage and cultural trauma was so great that it wasn’t until the 60′s and 70′s that pow wow’s experienced a revival in US & Canada. Generations of families under strict assimilation made people fearful and ashamed of expressing their culture and language, or unable to due to lost family traditions.

Think about that stain on the pages of history next time someone flippantly calls a group meeting a “pow wow”.