He participated in the Lake Simcoe–Lake Huron Purchase in 1815, served the provincial government during the Upper Canada Rebellion, and was the first and founding chief of the Beausoleil First Nation.
It was the elder Aisance, apparently, whose name is recorded among the five Ojibwe chiefs who authorized the surrender of the area to the provincial government in the Penetanguishene Bay Purchase in 1798.
[7] Aisance was not involved in this purchase—the Otter clan was represented instead by Muskigonce—which left the Ojibwe with virtually no territory of their own, although they reserved the right to continue to range and hunt across the land they had relinquished.
He opened talks with Musquakie and Aisance and persuaded them to leave the Simcoe-Coldwater corridor (which had remained Crown land), enticing them with the promise of one-third of the proceeds of the anticipated sales of lots there to European settlers.
[13] In 1842, Aisance joined four other chiefs in signing Musquakie's complaint to Governor General Charles Bagot, protesting that Bond Head had not fully explained the 1836 purchase agreement, and had, in particular, not made it clear that it did not involve an upfront, lump-sum payment, nor that the Ojibwe would receive only one-third of the sale proceeds.
The Ojibwe were soon dismissed, at which they complained "most bitterly" to government agents that the small stipend paid to them for this brief period of service was too little to offset the economic blow of having been compelled to abandon their hunting.
In 1842, Aisance and his band left Coldwater and relocated to Beausoleil Island in Georgian Bay, a move that brought them closer to their chief's native country around Penetanguishene.