Twenty years after Treaty No. 8 was signed, oil was discovered in the Mackenzie River Valley. Upon the discovery, the Canadian Government proposed another treaty that would clear the way for miners and development of the area. The treaty was greatly debated, as the Natives did not want to lose their right to hunt, fish, gather, and trap in the area. They also opposed being "confined to Indian reserves." Many Dene felt that Treaty No. 8 was not honoured by the Canadian Government, and some were afraid that this treaty would turn out similarly. Nevertheless, Treaty No. 11 was signed by the Tłı̨chǫ trading chief Monfwi in the summer of 1921. The Tłı̨chǫ groups that signed this treaty were then known as the "Dog Rib Rae Band" (Helm, 7: 1994), constituting the majority of the Tłįchǫ population. Both Treaty No. 8 and Treaty No. 11 overlap in several of their boundaries, and continue to cause conflict between the two separate treaty bands (nowadays two First Nations).